Upgraded appcompat to 1.2.0-rc-02

[andreidiaconu]

This should solve this issue with appcompat webview reported here: https://issuetracker.google.com/issues/141132133

Some background: I got this exception on android API 21 and after investigating, I found out this is a bug from appcompat that was fixed and is available starting with 1.2.0 (which is now in rc2)

D/ChromeBrowserManager( 5600): WebView fallback declared.
W/art     ( 5600): Before Android 4.1, method android.graphics.PorterDuffColorFilter androidx.vectordrawable.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
I/art     ( 5600): Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>
I/art     ( 5600): Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>
W/chromium( 5600): [WARNING:proxy_service.cc(901)] PAC support disabled because there is no system implementation
W/chromium( 5600): [WARNING:data_reduction_proxy_settings.cc(403)] SPDY proxy OFF at startup
W/ResourceType( 5600): No known package when getting value for resource number 0x02040002
D/AndroidRuntime( 5600): Shutting down VM
W/CrashlyticsCore( 5600): Cannot send reports. Settings are unavailable.
E/AndroidRuntime( 5600): FATAL EXCEPTION: main
E/AndroidRuntime( 5600): Process: XXXXXXXX, PID: 5600
E/AndroidRuntime( 5600): java.lang.RuntimeException: Unable to start activity ComponentInfo{XXXXXXXX/com.pichillilorenzo.flutter_inappwebview.InAppBrowser.InAppBrowserActivity}: android.view.InflateException: Binary XML file line #13: Error inflating class com.pichillilorenzo.flutter_inappwebview.InAppWebView.InAppWebView
E/AndroidRuntime( 5600): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
E/AndroidRuntime( 5600): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
E/AndroidRuntime( 5600): 	at android.app.ActivityThread.access$800(ActivityThread.java:144)
E/AndroidRuntime( 5600): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
E/AndroidRuntime( 5600): 	at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 5600): 	at android.os.Looper.loop(Looper.java:135)
E/AndroidRuntime( 5600): 	at android.app.ActivityThread.main(ActivityThread.java:5221)
E/AndroidRuntime( 5600): 	at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 5600): 	at java.lang.reflect.Method.invoke(Method.java:372)
E/AndroidRuntime( 5600): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
E/AndroidRuntime( 5600): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
E/AndroidRuntime( 5600): Caused by: android.view.InflateException: Binary XML file line #13: Error inflating class com.pichillilorenzo.flutter_inappwebview.InAppWebView.InAppWebView
E/AndroidRuntime( 5600): 	at android.view.LayoutInflater.createView(LayoutInflater.java:633)
E/AndroidRuntime( 5600): 	at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)
E/AndroidRuntime( 5600): 	at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
E/AndroidRuntime( 5600): 	at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
E/AndroidRuntime( 5600): 	at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
E/AndroidRuntime( 5600): 	at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
E/AndroidRuntime( 5600): 	at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:555)
E/AndroidRuntime( 5600): 	at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161)
E/AndroidRuntime( 5600): 	at com.pichillilorenzo.flutter_inappwebview.InAppBrowser.InAppBrowserActivity.onCreate(InAppBrowserActivity.java:70)
E/AndroidRuntime( 5600): 	at android.app.Activity.performCreate(Activity.java:5937)
E/AndroidRuntime( 5600): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
E/AndroidRuntime( 5600): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
E/AndroidRuntime( 5600): 	... 10 more
E/AndroidRuntime( 5600): Caused by: java.lang.reflect.InvocationTargetException
E/AndroidRuntime( 5600): 	at java.lang.reflect.Constructor.newInstance(Native Method)
E/AndroidRuntime( 5600): 	at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
E/AndroidRuntime( 5600): 	at android.view.LayoutInflater.createView(LayoutInflater.java:607)
E/AndroidRuntime( 5600): 	... 21 more
E/AndroidRuntime( 5600): Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x2040002
E/AndroidRuntime( 5600): 	at android.content.res.Resources.getText(Resources.java:274)
E/AndroidRuntime( 5600): 	at android.content.res.Resources.getString(Resources.java:360)
E/AndroidRuntime( 5600): 	at com.android.org.chromium.content.browser.ContentViewCore.setContainerView(ContentViewCore.java:702)
E/AndroidRuntime( 5600): 	at com.android.org.chromium.content.browser.ContentViewCore.initialize(ContentViewCore.java:608)
E/AndroidRuntime( 5600): 	at com.android.org.chromium.android_webview.AwContents.createAndInitializeContentViewCore(AwContents.java:619)
E/AndroidRuntime( 5600): 	at com.android.org.chromium.android_webview.AwContents.setNewAwContents(AwContents.java:758)
E/AndroidRuntime( 5600): 	at com.android.org.chromium.android_webview.AwContents.<init>(AwContents.java:608)
E/AndroidRuntime( 5600): 	at com.android.org.chromium.android_webview.AwContents.<init>(AwContents.java:546)
E/AndroidRuntime( 5600): 	at com.android.webview.chromium.WebViewChromium.initForReal(WebViewChromium.java:312)
E/AndroidRuntime( 5600): 	at com.android.webview.chromium.WebViewChromium.access$100(WebViewChromium.java:97)
E/AndroidRuntime( 5600): 	at com.android.webview.chromium.WebViewChromium$1.run(WebViewChromium.java:264)
E/AndroidRuntime( 5600): 	at com.android.webview.chromium.WebViewChromium$WebViewChromiumRunQueue.drainQueue(WebViewChromium.java:124)
E/AndroidRuntime( 5600): 	at com.android.webview.chromium.WebViewChromium$WebViewChromiumRunQueue$1.run(WebViewChromium.java:111)
E/AndroidRuntime( 5600): 	at com.android.org.chromium.base.ThreadUtils.runOnUiThread(ThreadUtils.java:144)
E/AndroidRuntime( 5600): 	at com.android.webview.chromium.WebViewChromium$WebViewChromiumRunQueue.addTask(WebViewChromium.java:108)
E/AndroidRuntime( 5600): 	at com.android.webview.chromium.WebViewChromium.init(WebViewChromium.java:261)
E/AndroidRuntime( 5600): 	at android.webkit.WebView.<init>(WebView.java:548)
E/AndroidRuntime( 5600): 	at android.webkit