1. Add new API in DWPC to get windowing features of the virtual display.
2. In ActivityRecord, consume the value of the allowed windowing modes
of virtual display.
Bug: 180435098
Test: atest WmTests:ActivityRecordTests#testSupportsPictureInPicture && atest WmTests:DisplayWindowPolicyControllerHelperTests
Change-Id: I39a6cd9417f266f7fdef72cc054263c3ca4c5650