Move biometrics into biometric namespace

All biometrics (fingerprint/iris/face) are now under
android.hardware.biometrics namespace. Fingerprint has a legacy
android.hardware.fingerprint definition for compatibility.

Bug: 115639644

Test: biometrics are available on their respective devices

Change-Id: I947d6793a879b2b92aea2ed5e57c86e490c7289e