Fixed check enrolled fingerpint a11y issue

- Set setAccessibilityLiveRegion to the recognized fingerprint view
  container so that we can keep the content description of its child
  views (the rename and the delete views)
- Update the content description of the container to the recognized
  finger name
- Set setAccessibilityDelegate to the container to reset the
  setAccessbilityLiveRegion and content descrption of the container when
  focused so that talkback can correctly speak the child view's content
  description.

Bug: 407461322
Test: 1. Enroll a fingerprint
      2. Enable talkback
      3. Go Fingerprint setting and use check enroll
Flag: EXEMPT bugfix
Change-Id: I7605a0de785c2f9ee604e06adc2c5734c474ce5b
1 file changed