Added systemui controller to control system bars.

When config_remoteInsetsControllerControlsSystemBars is true,
DisplaySystemBarsController provides its own policy of how system
bars are displayed for specific packages. Currently limited to
only auto versions of Android.

Bug: 149585273
Test: Manual, atest BarControlPolicyTest, atest InsetsPolicyTest,
      atest DisplaySystemBarsControllerTest
Change-Id: Ie6b1cc3e2760cbc9e48d62dfbd8bc3e23ffca20c
Merged-In: Ie6b1cc3e2760cbc9e48d62dfbd8bc3e23ffca20c