We observed a race condition that when work challenge is launched from
notification, the biometric prompt quickly dismisses itself because
it detects the launcher is now the foreground app. This change attempts
to workaround the issue by enabling the setAllowBackgroundAuthentication
optin in BiometricPrompt so it no longer dismisses itself even if the
foreground app is different.
Bug: 279766640
Test: manual
Change-Id: I453b7d603c6eb65f329afb38d8a190e21a7e4c01
5b42447d29