Merge "Add keep rules for WeaklyReferencedCallback annotation" into main

  @com.android.internal.annotations.KeepForWeakReference <fields>;

}

# Needed to ensure callback field references are kept in their respective

# owning classes when the downstream callback registrars only store weak refs.

-if @com.android.internal.annotations.WeaklyReferencedCallback class *

-keepclassmembers,allowaccessmodification class * {

  <1> *;

}

-if class * extends @com.android.internal.annotations.WeaklyReferencedCallback **

-keepclassmembers,allowaccessmodification class * {

  <1> *;

}

# Understand the common @Keep annotation from various Android packages:

#  * android.support.annotation

#  * androidx.annotation