Merge "Ensure line numbers are preserved in default Proguard config"

# that isn't explicitly part of the API

-dontskipnonpubliclibraryclasses -dontskipnonpubliclibraryclassmembers

# Preserve line number information for debugging stack traces.

-keepattributes SourceFile,LineNumberTable

# Annotations are implemented as attributes, so we have to explicitly keep them.

# Keep all runtime-visible annotations like RuntimeVisibleParameterAnnotations

# and RuntimeVisibleTypeAnnotations, as well as associated defaults.