[Fingerprint] Make enroll progress bar scalable

Make the fingerprint enroll progress bar scalable by moving it to a
single FingerprintProgressBar view and make it fill the remaining
space.

- The background fingerprint icon was changed to include the padding
internally so it can be added as the background directly onto the
progress bar view.
- The icon in landscape mode is also fixed to use the fingerprint
icon rather than the lock icon.

Test: cd tests/robotests && mm
Bug: 32123370
Change-Id: Ia5cf37d92f0af7c1cf39287f5070c44f51d44878