Fix active permission touch target too small

- Set buttons non-clickable to not consume events
- Add a11y contentDescription for active permissions buttons

Bug: 78198386
Test: manually receive messenger video call and verify touch targets
Test: manually record screen and verify with talkback/keyboard
Change-Id: I1b53cd1d7a88e44bd6e188b1055c8572c9d5731d
2 files changed