Merge "Refine keep rules for Java classes w/ native methods" am: 170a9aba

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2355959



Change-Id: I72b8cd4f7e6a51f1f40332923de4b67d87684129
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>