Merge "Add a flag meant to guard the talkback fix for the KeyguardIndicationTextView" into udc-dev am: 0404e1bced am: bc4391640c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23640529

Change-Id: Iab7d39c65451def3918359e496488a78f90d293a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>