Adds new mappings to content descriptions for custom clock faces

Bug: 278652573
Test: Manually with Talkback
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:11ec46323be2b797c0c910a7035c04dc22516bd1)
Merged-In: I080d8ad06ef5d002341113a0e795d5edceeeff06
Change-Id: I080d8ad06ef5d002341113a0e795d5edceeeff06
10 files changed