Merge "Silence unused-but-set-variable warnings." into main am: ddaefbc0

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2925165



Change-Id: I60939ff59f62409b25df381797f0ada156529884
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>