Stop using halDeviceId

The deviceId currently returned by the HAL is only used to determine
if the callback has successfully been set. Any state that it's being
used to track is currently redundant with the pointer to the actual
HAL (e.g. determing if the HAL is found, if it has crashed, etc).

Remove this information to reduce confusion.

Also removed enumerate callback, since only system server handles
enumeration results (upper layers never touch this)

Bug: 149067920
Test: Enroll, auth on fingerprint and face devices
Test: atest com.android.server.biometrics

Change-Id: I1275a91da6f773934be663731ddf1802e0161090