Update FaceSettings to match mocks

Settings page should not show if device credential is not confirmed

Bug: 111548037
Fixes: 116531896

Test: adb shell settings get secure face_unlock_app_enabled
Test: make -j56 RunSettingsRoboTests

Change-Id: I651ee88e9ee4017ee3dc52fa8a5d05cb8f092e1d
10 files changed