tree f639d308fd3d3326f0b3ed2c8efc68471f9f7986
parent ede9fb07a6f0251f1d7fff081afeb547865331fe
author Curtis Belmonte <curtislb@google.com> 1571946901 -0700
committer Curtis Belmonte <curtislb@google.com> 1571954484 -0700

Check for null receiver in biometric AuthController

We've witnessed at least one crash due to mReceiver being null while
trying to handle callbacks such as onTryAgainPressed in AuthController
(formerly BiometricDialogImpl). In these cases, not running the callback
is likely better than crashing, so this commit adds null-checks where
they're currently missing. It also adds unit test cases to exercise the
new logic.

Test: atest AuthControllerTest
Fixes: 143251337
Change-Id: I3c46c7fab0dfe802de499180c7bb0c756f7e652b