Merge "Fix a11y announcements in DND duration dialogs" into tm-qpr-dev am: 59ec8d18ee am: 77b5a8d6a7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21521305

Change-Id: I93186474d8aa1c1e628affe8c61e7063adf0ea31
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>