Cancel coroutine job before replacing BiometricContextListener

Only allow one IBiometricContextListener to be registered at a time in
AuthController, and cancel previous coroutine jobs before replacing
the listener. Otherwise, the coroutines of old listener will continue to
run forever.

Bug: 317205264
Bug: 316125692
Flag: NONE
Test: AuthControllerTest
Change-Id: I0617aefbece18a261aed43ce5c90fc5ef1094338