libcamera: camera: Rename name() to id()

Rename Camera::name() to camera::id() to better describe what it
represents, a unique and stable ID for the camera. While at it improve
the documentation for the camera ID to describe it needs to be stable
for a camera between resets of the system.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/android/camera_device.cpp

@@ -1108,7 +1108,7 @@ int CameraDevice::configureStreams(camera3_stream_configuration_t *stream_list)
 	int ret = camera_->configure(config_.get());
 	if (ret) {
 		LOG(HAL, Error) << "Failed to configure camera '"
-				<< camera_->name() << "'";
+				<< camera_->id() << "'";
 		return ret;
 	}
 
@@ -1276,7 +1276,7 @@ void CameraDevice::requestComplete(Request *request)
 
 std::string CameraDevice::logPrefix() const
 {
-	return "'" + camera_->name() + "'";
+	return "'" + camera_->id() + "'";
 }
 
 void CameraDevice::notifyShutter(uint32_t frameNumber, uint64_t timestamp)