Add mandatory biometric prompt to platform surfaces (4/N)

1. Enable developer options via build info
2. Enable developer options via toggle under system -> developer options

Flag: android.hardware.biometrics.flags.mandatory_biometrics
Fixes: 355500452
Test: atest BuildNumberPreferenceControllerTest
DevelopmentSettingsDashboardFragmentTest

Change-Id: Iecbe34024d287e71e235becec3ce5a2bd5c1697f