andrdid: camera_device: Store const templates

The request capture templates stored in the
CameraDevice::requestTemplates_ should not be modified once created.

Store a const pointer to the request templates in the class member
map.

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

src/android/camera_device.h

@@ -95,7 +95,7 @@ private:
 	std::unique_ptr<libcamera::CameraConfiguration> config_;
 
 	CameraMetadata *staticMetadata_;
-	std::map<unsigned int, CameraMetadata *> requestTemplates_;
+	std::map<unsigned int, const CameraMetadata *> requestTemplates_;
 	const camera3_callback_ops_t *callbacks_;
 
 	std::vector<Camera3StreamConfiguration> streamConfigurations_;