Merge "[Output Switcher] [A11y] Add description for seekbar" into tm-dev am: 14f92d8897

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18572029

Change-Id: I54ba8cbec53a0ae9667dde4626d4ce71fdb79a35
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>