Merge "transitive r8 flags for installable {android,java}_libraries" into main am: d9569528

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2812555



Change-Id: I3238b8f999bdde7038d119c8e9926b66d5f852ff
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>