Fixes: dotnet#7532

Whenever any MonoVM APIs are called, the current thread of execution
must be attached to the runtime or we risk native code crashes, for
instance:

    Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x40 in tid 1860 (jg_fr_pool_thre), pid 1792 (yname.sampleapp)
    backtrace:
      00 pc 0011588e  /data/app/~~lwgdvtQhIfK0II0Nd0mtag==/com.companyname.sampleapp-8yF54k9YuWCWpsuGRJvVQw==/lib/x86/libmonosgen-2.0.so
      01 pc 001156ae  /data/app/~~lwgdvtQhIfK0II0Nd0mtag==/com.companyname.sampleapp-8yF54k9YuWCWpsuGRJvVQw==/lib/x86/libmonosgen-2.0.so
      02 pc 00115575  /data/app/~~lwgdvtQhIfK0II0Nd0mtag==/com.companyname.sampleapp-8yF54k9YuWCWpsuGRJvVQw==/lib/x86/libmonosgen-2.0.so (mono_threads_enter_gc_unsafe_region_internal+53)
      03 pc 000973c3  /data/app/~~lwgdvtQhIfK0II0Nd0mtag==/com.companyname.sampleapp-8yF54k9YuWCWpsuGRJvVQw==/lib/x86/libmonosgen-2.0.so (mono_runtime_invoke+51) (BuildId: c54662bbf82dbdadd595ca9d3e31dce29735885f)
      04 pc 00027ace  /data/app/~~lwgdvtQhIfK0II0Nd0mtag==/com.companyname.sampleapp-8yF54k9YuWCWpsuGRJvVQw==/lib/x86/libmonodroid.so (xamarin::android::internal::MonodroidRuntime::Java_mono_android_Runtime_register(_JNIEnv*, _jstring*, _jclass*, _jstring*)+286)
      05 pc 000279a0  /data/app/~~lwgdvtQhIfK0II0Nd0mtag==/com.companyname.sampleapp-8yF54k9YuWCWpsuGRJvVQw==/lib/x86/libmonodroid.so (Java_mono_android_Runtime_register+48)

The above trace translates to the following locations in the Mono
runtime:

    copy_stack_data_internal
    /__w/1/s/src/mono/mono/utils/mono-threads-coop.c:191
    copy_stack_data
    /__w/1/s/src/mono/mono/utils/mono-threads-coop.c:246

    mono_threads_enter_gc_unsafe_region_unbalanced_with_info
    /__w/1/s/src/mono/mono/utils/mono-threads-coop.c:476

    mono_runtime_invoke
    /__w/1/s/src/mono/mono/metadata/object.c:2442

In this case, a pointer to Mono thread information
structure (`MonoThreadInfo*`) is null in `copy_stack_data` which, in
turn, causes the segfault when the pointer is dereferenced.

In the case of issue dotnet#7532, `Java_mono_android_Runtime_register` is
called on behalf of a 3rd party library on a thread that is, most
likely, created by that library and thus not (yet) attached to the
runtime by the time the registration attempt is made.

Attach thread to the runtime by calling
`mono_jit_thread_attach (nullptr)` in DotNet builds to fix the issue.
`nullptr` is used because .NET only has a single AppDomain and there's
no need to pass around pointers to it.

* main:
  [ci] Update PoliCheck exclusions (dotnet#7561)
  Bump to xamarin/xamarin-android-tools/main@59cac90 (dotnet#7546)
  Bump to dotnet/installer@355d664 8.0.100-alpha.1.22562.2 (dotnet#7505)

* main:
  Bump to xamarin/xamarin-android-tools/main@fa3711b (dotnet#7501)

* main:
  Bump to mono/mono@6dd9def5 (dotnet#7574)
  Bump to dotnet/installer@296eeb3 8.0.100-alpha.1.22570.9 (dotnet#7571)
  [ci] Add API-33 to the nightly build (dotnet#7552)
  [docs] Fix typo in XA0134 (dotnet#7569)
  [docs] how to `dotnet trace` our build (dotnet#7573)
  [Xamarin.Android.Build.Tasks] Useful errors when using binutils (dotnet#7566)
  Bump SQLite to 3.40.0 (dotnet#7564)

It won't fix the failure, but extra logging might be useful at some
point. The current failure is:

    droid.NET_Test: java_vm_ext.cc:570] JNI DETECTED ERROR IN APPLICATION: use of invalid jobject 0x7100941bb830
    backtrace:
           #00 pc 00000000000943f8  /apex/com.android.runtime/lib64/bionic/libc.so (syscall+24) (BuildId: a08a19770d6696739c847e29c3f5f650)
           #1 pc 0000000000097146  /apex/com.android.runtime/lib64/bionic/libc.so (abort+182) (BuildId: a08a19770d6696739c847e29c3f5f650)
           #2 pc 000000000055321f  /apex/com.android.runtime/lib64/libart.so (art::Runtime::Abort(char const*)+2399) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           #3 pc 000000000000c873  /system/lib64/libbase.so (android::base::LogMessage::~LogMessage()+611) (BuildId: 40d2b536dbf0730fdc31abd2b469f94f)
           dotnet#4 pc 00000000003ede64  /apex/com.android.runtime/lib64/libart.so (art::JavaVMExt::JniAbort(char const*, char const*)+1604) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#5 pc 00000000003ee16a  /apex/com.android.runtime/lib64/libart.so (art::JavaVMExt::JniAbortF(char const*, char const*, ...)+234) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#6 pc 00000000005adf7b  /apex/com.android.runtime/lib64/libart.so (art::Thread::DecodeJObject(_jobject*) const+875) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#7 pc 00000000003def7b  /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::CheckInstance(art::ScopedObjectAccess&, art::(anonymous namespace)::ScopedCheck::InstanceKind, _jobject*, bool)+91) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#8 pc 00000000003de1e5  /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::CheckPossibleHeapValue(art::ScopedObjectAccess&, char, art::(anonymous namespace)::JniValueType)+485) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#9 pc 00000000003de2d4  /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::CheckPossibleHeapValue(art::ScopedObjectAccess&, char, art::(anonymous namespace)::JniValueType)+724) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#10 pc 00000000003dd712  /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::ScopedCheck::Check(art::ScopedObjectAccess&, bool, char const*, art::(anonymous namespace)::JniValueType*)+690) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#11 pc 00000000003e28c0  /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CheckCallArgs(art::ScopedObjectAccess&, art::(anonymous namespace)::ScopedCheck&, _JNIEnv*, _jobject*, _jclass*, _jmethodID*, art::InvokeType, art::(anonymous namespace)::VarArgs const*)+160) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#12 pc 00000000003e1a9e  /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CallMethodV(char const*, _JNIEnv*, _jobject*, _jclass*, _jmethodID*, __va_list_tag*, art::Primitive::Type, art::InvokeType)+910) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#13 pc 00000000003cf551  /apex/com.android.runtime/lib64/libart.so (art::(anonymous namespace)::CheckJNI::CallObjectMethod(_JNIEnv*, _jobject*, _jmethodID*, ...)+177) (BuildId: 8bb3225e7c408f2ca23abac3db0417f2)
           dotnet#14 pc 00000000000013ec  /data/app/Mono.Android.NET_Tests--O9vgexkYeCx3nX-AuvLTQ==/split_config.x86_64.apk!libreuse-threads.so (offset 0xa8d000) (BuildId: 562d86d81ebdd3bb6b7528e2a9235ff84827294e)
           dotnet#15 pc 0000000000100fce  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+30) (BuildId: a08a19770d6696739c847e29c3f5f650)
           dotnet#16 pc 0000000000098fe7  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+55) (BuildId: a08a19770d6696739c847e29c3f5f650)

* main:
  LEGO: Merge pull request 7584
  LEGO: Merge pull request 7582
  [build] Pass NuGet.config when restoring (dotnet#7578)
  Bump to xamarin/monodroid@8c54ea6d (dotnet#7576)