android: Move buffer mapping to CameraStream

The destination buffer for the post-processing component is
currently first mapped in the CameraDevice class and then passed
to CameraStream which simply calls the post-processor interface.

Move the mapping to CameraStream::process() to tie the buffer
mapping to the lifetime of the CameraBuffer instance.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

src/android/camera_stream.h

@@ -120,7 +120,7 @@ public:
 
 	int configure();
 	int process(const libcamera::FrameBuffer &source,
-		    libcamera::MappedBuffer *destination,
+		    buffer_handle_t camera3Dest,
 		    const CameraMetadata &requestMetadata,
 		    CameraMetadata *resultMetadata);
 	libcamera::FrameBuffer *getBuffer();