Merge "Suppress R8 warnings for support library annotations" am: 2dca04c64d am: 8c90005ff0 am: 19ca755ba3

Original change: https://android-review.googlesource.com/c/platform/build/+/2182775

Change-Id: I143b236a22eeb5846658df9116a1829216e07921
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/proguard_basic_keeps.flags

@@ -75,6 +75,19 @@
 # has a fallback, but again, don't use Futures.getChecked on Android regardless.
 -dontwarn java.lang.ClassValue
 
+# Ignore missing annotation references for various support libraries.
+# While this is not ideal, it should be relatively safe given that
+# 1) runtime-visible annotations will still be kept, and 2) compile-time
+# annotations are stripped by R8 anyway.
+# Note: The ** prefix is used to accommodate jarjar repackaging.
+# TODO(b/242088131): Remove these exemptions after resolving transitive libs
+# dependencies that are provided to R8.
+-dontwarn **android**.annotation*.**
+-dontwarn **com.google.errorprone.annotations.**
+-dontwarn javax.annotation.**
+-dontwarn org.checkerframework.**
+-dontwarn org.jetbrains.annotations.**
+
 # Less spammy.
 -dontnote