camera3: Update vendor tag spec for HAL 3.2.

- Deprecates vendor tag specification in camera3 device.
- Moves vendor tag ops declaration to camera metadata library and
  cleans up definitions.
- Updates the example HAL.

Change-Id: Ifb16bb0d4bbc896bc32d33dd150e7e174af57dad
diff --git a/modules/camera/CameraHAL.h b/modules/camera/CameraHAL.h
index a5edc85..cb0ec8b 100644
--- a/modules/camera/CameraHAL.h
+++ b/modules/camera/CameraHAL.h
@@ -20,6 +20,7 @@
 #include <cutils/bitops.h>
 #include <hardware/hardware.h>
 #include <hardware/camera_common.h>
+#include <system/vendor_tags.h>
 #include "Camera.h"
 #include "VendorTags.h"