camera: Fix memory leak in stop recording usecase.

Issue:
1. In CameraSource, if both recording proxy and local camera
   instances are null, the frames which are supposed to be
   returned back to Camera, will never be returned, causing
   memory leak.
2. If a frame is returned from CameraSource after stop recording
   is issued, Camera HAL cannot handle it because by that time
   it will be previewing state.

Fix:
1. Since camera handles are not available, close the native handle
   in CameraSource itself.
2. Close the duped native handles in cameraservice instead of
   delegating the responsibility to Camera HAL.

Bug: 30299751
CRs-Fixed: 1040448
Change-Id: I45a351d0813dff15034fa25b79987ceab07232bb