android: camera_worker: Use Camera3RequestDescriptor as cookie

Use Camera3RequestDescriptor as cookie for the Capture Request.
The cookie is used to lookup descriptors map in
CameraDevice::requestComplete(). The map will be transformed to a
queue in subsequent commit.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

src/android/camera_device.cpp

@@ -244,7 +244,8 @@ CameraDevice::Camera3RequestDescriptor::Camera3RequestDescriptor(
 	 * Create the CaptureRequest, stored as a unique_ptr<> to tie its
 	 * lifetime to the descriptor.
 	 */
-	request_ = std::make_unique<CaptureRequest>(camera);
+	request_ = std::make_unique<CaptureRequest>(camera,
+						    reinterpret_cast<uint64_t>(this));
 }
 
 /*