Add CaptureRequest per frame to VirtualCameraService

Add support in the VirtualCameraService to pass the settings from the
CaptureRequest encapsulated as VirtualCameraMetadata in the
onProcessCaptureRequestWithMetadata if the per frame camera metadata
support is enabled.

Bug: 371167033
Test: atest VirtualCameraTest
Flag: android.companion.virtualdevice.flags.virtual_camera_metadata
Change-Id: I6d39178a7d24d0612e12f610dc890cf833ad09ce