Add CaptureRequest metadata for VirtualCamera

If per frame camera metadata support is enabled, call
the onProcesRequestWithMetadata callback with an additional
CaptureRequest parameter.

Bug: 371167033
Test: atest VirtualCameraTest
Flag: android.companion.virtualdevice.flags.virtual_camera_metadata
Change-Id: If7b217a1da0929ec39c4572c1d6b8da864841330