Fix Settings crash when clicks Notifications

- FaceSettingsLockscreenBypassPreferenceController's preference key
is different from that in xml. Use DashboardFragment generic way to
create PreferenceController which bind the preference key defined in
xml.
- Also refine the way of fixing b/140878309

Fixes: 145893081
Test: manual check FaceSettings and Notification Settings
Change-Id: Ia80e755e3f86b44e771b0cf80c9bf53a8ef8f430