Update Biometric Prompt padding

- Updates BP padding to match spec
- Fixes AuthContainerViewTest
- Fixes transition from BP to credential view
- Fixes icon size when transitioning from implicit face to fingerprint

Test: Manual
Test: atest AuthContainerViewTest
Bug: 288175072
Flag: ACONFIG constraint_bp DEVELOPMENT
Change-Id: I950caf1e66c789ebc9dc7bd1fd289bb0e4aac1ce