Condense landscape layout of auth credential password view

Changes the layout of the biometric prompt auth credential password
when in landscape orientation, in order to prevent the keyboard from
obscuring the password/PIN entry or error text views. Specifically:
- Removes the icon from the layout
- Reduces/removes padding and spacers

Test: CTS Verifier > Biometric Tests > 4a: Credential, Cipher
Test: Biometric support demo app

Fixes: 155041280
Change-Id: I8d576f76d2e90b1830a22aebbfc12559634b6b75