Distinct callback for each request

1. Created a callback class for face and fingerprint
2. Each biometric request has a new receiver
3. This ensures that the accurate callback is used, instead of the most
   recent one

Test: atest FingerprintManagerTest FaceManagerTest
Bug: 314165741
Change-Id: I37bac28544c422d5cdaa179e464927811f0bfc49
6 files changed