[Media TTT] Re-name the status bar gesture handler to be more generic. am: 82042d1876 am: b5d15baad9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21024664

Change-Id: I4b344bfb0942b0831b3e16628b56eb61594666b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>