Talkback for edit QS, action as part of context.

Accessibility context for moving or adding tiles has context label as
"Add tile X to position Y" or "Move tile X to position Y" while moving
cursor. No confirmation announcement after accepting.

Removed unused strings.

Change-Id: I6cf0fbe110f9231e592ee51820edd24541f98c5c
Fixes: 79154713
Test: Manual
2 files changed