Show scrimmed bouncer from BiometricUnlockCtrl

Test: manual
Test: atest BiometrisUnlockControllerTest
Fixes: 206423147
Bug: 205556311
Change-Id: Ib3def01e7ffd04ac950f06cbee7d213927110b5b
(cherry picked from commit 7c64f2cd038e54fdb4df885420dda0f7c6846801)
Merged-In: Ib3def01e7ffd04ac950f06cbee7d213927110b5b
(cherry picked from commit 80d6a378b9943fa072458be23c675a0bba8e83fd)
Merged-In:Ib3def01e7ffd04ac950f06cbee7d213927110b5b
2 files changed