Added changes for adding a11y changes for the clock carousel

This CL aims at adding a11y related changes to the components in the
view hierarchy of the clock carousel.

Bug: b/278649728
Test: Tested by building and installing picker on local, and turning on
talkback and checking if the announcements made are in line what's
expected. Attached video in bug.
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:591185e8dea31db4122675e2beaa4672c66596fb)
Merged-In: I788dee93d661dee101ed80489ec75a01b9138ec7
Change-Id: I788dee93d661dee101ed80489ec75a01b9138ec7
1 file changed