Make the requested visibility always up-to-date

The new logic sends the requested visibility to server even when the
client doesn't have a control. This makes the requested visibility
reliable at the server side.

This CL also changes getRequestedState to getRequestedVisibility in
WindowState, because the frames in getRequestedState are not reliable.

Fix: 161247175
Fix: 166819574
Test: atest DisplayPolicyLayoutTests DisplayPolicyTests InsetsPolicyTest
            InsetsSourceProviderTest InsetsStateControllerTest
            WindowStateTests InsetsAnimationControlImplTest
            InsetsControllerTest WindowAddRemovePerfTest
            ActivityRecordTests
Change-Id: I7d32dacaa1302bab61386f5bd69aaa7dde953ebe