Move BP window to Keyguard_dialog

Bug: 384727394
Test: UdfpsControllerTest
Test: UdfpsControllerOverlayTest
Flag: EXEMPT bugfix

Change-Id: Ifce421be7997eca4323a2e0412abca5753b6b787
(cherry picked from commit 47fd897138eb2c9ee3a25ca35970d34178226f6a)
6 files changed