Bubble layout change.

- Flip back-to-call button icon.
- Use different button height for portrait and landscape. In order to make it work, we also create new ViewHolder object when bubble shows and remove reset() when bubble hides.

Bug: 67605985
Test: NewBubbleImplIntegrationTest, NewBubbleImplTest, NewReturnToCallControllerTest
PiperOrigin-RevId: 184768224
Change-Id: If4e613b12e39c647c34f4cb63a7f934043d42ec7
4 files changed