Merge "Add ability of setting content description for footer" into sc-dev am:...

Merge "Add ability of setting content description for footer" into sc-dev am: 11d6467e am: 30bda1f4 am: 9542f70d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14526745

Change-Id: I5ae05de7189db1a4e2eb1ce8b4fba1196737f16c