27884 Prevent a race between SurfaceTexture.release and attachToGLContext (platform-android, cla: yes, waiting for tree to go green, needs tests)

27893 Adds semantics tooltip support (platform-android, cla: yes, waiting for tree to go green, platform-fuchsia, embedder)

27915 Fix memory leak in PlatformViewsController (platform-android, cla: yes, waiting for tree to go green)

27924 Fix the SurfaceTexture related crash by replacing the JNI weak global reference with WeakReference (platform-android, cla: yes, waiting for tree to go green, needs tests)

27942 Provide Open JDK 11 (platform-android, cla: yes, waiting for tree to go green)

27946 Avoid crashing when FlutterImageView is resized to zero dimension (platform-android, cla: yes, waiting for tree to go green, needs tests)