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