Hide task bar on AOD

The previous logic only checks the existance of navigation bar. Check
task bar as well to make sure task bar gesture bar can be hidden
correctly on AOD.

Inject StatusBarKeyguardViewManager into TaskbarDelegate instead of the
reverse way to avoid loop injection.

Bug: 259759616
Test: See the bug's reproduce steps.
Test: atest StatusBarKeyguardViewManagerTest TaskbarDelegateTest
Change-Id: I8f1764d1baf59a5fbf44ab6f92845eac7c231608