Debug symbols for native libs not stripped

[AaronChen0]

The latest commit has the following note in build log.

> Task :mobile:stripDebugDebugSymbols
Unable to strip the following libraries, packaging them as they are: libbarhopper_v3.so, libimage_processing_util_jni.so, libredsocks.so, libsslocal.so, libtun2socks.so.

Tested in a release build too. And the native libs libtun2socks.so and libredsocks.so are now around 1MB, while in previous version they are around 150 KB.

This commit does not have that unable-to-strip note.

Possible reasons:

1. ndkVersion was moved from buildSrc to core.
2. API 35 is beta. The Android Gradle plugin (8.5.2) was tested up to compileSdk = 34.

[AaronChen0]

I can confirm the reason is that ndkVersion was moved from buildSrc to core.