Merge "Cleanup default proguard flags and remove no-op rules" into main

# We have moved -dontobfuscate and -dontoptimize to the makefiles.

# dex does not like code run through proguard optimize and preverify steps.

# -dontoptimize

-dontpreverify

# Don't obfuscate. We only need dead code striping.

# -dontobfuscate

# Add this flag in your package's own configuration if it's needed.

#-flattenpackagehierarchy

# Keep classes and members with the platform-defined @VisibleForTesting annotation.

-keep @com.android.internal.annotations.VisibleForTesting class *

-keepclassmembers class * {

# Some classes in the libraries extend package private classes to chare common functionality

# that isn't explicitly part of the API

-dontskipnonpubliclibraryclasses -dontskipnonpubliclibraryclassmembers

# Preserve line number information for debugging stack traces.

-keepattributes SourceFile,LineNumberTable