[Status Bar] Disable the keyguard status bar when we get the

DISABLE_SYSTEM_INFO or DISABLE2_SYSTEM_ICONS flags.

Fixes: 240590557
Test: manual: CTS Verifier tests > Device Owner Tests > LockTasks UI >
Enable keyguard. Turn screen off then turn screen on and verify the
status bar in keyguard doesn't display.
Test: manual: Verify keyguard status bar typically displays when not in
the CTS verifier test case
Test: DisableStateTrackerTest
Test: KeyguardStatusBarViewControllerTest

Change-Id: I4d19a168c295abee1ddfdf61452343dafa54cfc2