Add default proguard flags from guava
Guava 27.1 causes some warnings in R8, silence them.
Bug: 130306229
Test: m checkbuild
Change-Id: Ia9948d597538a16c5b7ab26a2e41eebde52e7427
Merged-In: Ia9948d597538a16c5b7ab26a2e41eebde52e7427
Exempt-From-Owner-Approval: cherry pick
(cherry picked from commit b4917146aa3b7de6e23aff2834871837067cffeb)
diff --git a/core/proguard_basic_keeps.flags b/core/proguard_basic_keeps.flags
index 3c25e89..256b2ec 100644
--- a/core/proguard_basic_keeps.flags
+++ b/core/proguard_basic_keeps.flags
@@ -66,5 +66,12 @@
# See bug/20658265.
# -dontwarn android.support.**
+# From https://github.com/google/guava/wiki/UsingProGuardWithGuava
+# Striped64, LittleEndianByteArray, UnsignedBytes, AbstractFuture
+-dontwarn sun.misc.Unsafe
+# Futures.getChecked (which often won't work with Proguard anyway) uses this. It
+# has a fallback, but again, don't use Futures.getChecked on Android regardless.
+-dontwarn java.lang.ClassValue
+
# Less spammy.
-dontnote
