[automerger skipped] Change binderRpcTest to use 'activity' for a Java test service am: ba6818ccba -s ours

am skip reason: Merged-In I71fea4daeb929971add9eefa96e3d48f815e2212 with SHA-1 29db860bfa is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/28804330

Change-Id: I48a04b09f6fa5b8b1f2dae4f31dca98546681496
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>