Merge "Removes old/unused left/right button logic from bottom area." into tm-qpr-dev am: 4c5423146c am: b1a7e1b6ba

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19119857

Change-Id: I5e2e26350696891704d4e0e817620c8c0414d23b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>