feat: add AutoWhiteBalance protobuf messages

protobuf_definitions/control.proto

@@ -229,10 +229,19 @@ message FormatRemovableStorageDeviceCtrl {
 }
 
 // Message sent when the user wants to set turbidity filter settings.
+// Uses CLAHE to enhance the contrast of the video, which can make it easier to see details in turbid water.
+// Only supported on X3 Ultra.
 message SetTurbidityFilterCtrl {
   FilterMessage turbidity_filter = 1; // Message with the turbidity filter settings to set.
 }
 
+// Message sent when the user wants to set auto white balance settings.
+// Removes underwater color casts using the Gray World algorithm.
+// Only supported on X3 Ultra.
+message SetAutoWhiteBalanceCtrl {
+  FilterMessage awb_filter = 1; // Message with the auto white balance settings to set.
+}
+
 // Issue a command to set the digital pan, tilt, and zoom of the main camera.
 //
 // Only supported on X3 Ultra.

protobuf_definitions/telemetry.proto

@@ -334,6 +334,13 @@ message TurbidityFilterTel {
   FilterMessage turbidity_filter = 1; // Turbidity filter settings.
 }
 
+// Auto white balance settings telemetry message.
+//
+// Message is published when the filter settings are changed.
+message AutoWhiteBalanceTel {
+  FilterMessage awb_filter = 1; // Auto white balance settings.
+}
+
 // Digital pan, tilt, and zoom telemetry from the main camera.
 //
 // Reports the actual pan, tilt, and zoom state of the camera.