Accept authentication for app when it is top activity

- Allow successful auth for top activity even if it is not visible
- Cancel all sensors before hiding biometric prompt

Flag: EXEMPT bug fix
Fixes: 401031815
Test: atest FingerprintAuthenticationClientTest
FaceAuthenticationClientTest AuthControllerTest

Change-Id: I91b13f5c985e1d2c1647580a8819562bb359f941