[automerger skipped] Remove RemoteInputConnectionImpl#mLock, which is redudant am: e47a2e5c06 am: efedb4a8cf -s ours

am skip reason: Merged-In I69fa2c81670f84be3dd4a808262758a803f69dfc with SHA-1 4729f5701e is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2911222

Change-Id: I09ddb236c664229af254c8b8522cf5306850bb5f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>