Multiple shortcut menu for android R (8/n).

1. Fix that magnification has different access format from others into setting provider.
     - Replace String with ComponentName
2. Remove legacy png and replace it with vector drawable.
3. Revise strings.
4. Fix that shouldn't remove legacy target item when software button triggered.

Bug: b/147389656
Test: manual test
Change-Id: I733959702b2d520f73a759ec90a20b39193a417b