Merge "Address VirtualDisplayConfig API feedback." into udc-dev

core/api/current.txt

.../java/android/companion/virtual/VirtualDeviceManager.java

core/java/android/hardware/display/VirtualDisplayConfig.java

media/java/android/media/projection/MediaProjection.java

...rver/companion/virtual/GenericWindowPolicyController.java

...m/android/server/companion/virtual/VirtualDeviceImpl.java

...ava/com/android/server/display/VirtualDisplayAdapter.java

...er/companion/virtual/VirtualDeviceManagerServiceTest.java

...r/companion/virtual/audio/VirtualAudioControllerTest.java

...com/android/server/display/DisplayManagerServiceTest.java