modules: camera: default request templates

Change-Id: I0a4b389e1850c10e12a65b3c8a5670c78c6746f7
diff --git a/modules/camera/Metadata.h b/modules/camera/Metadata.h
index d5aac36..283e4a7 100644
--- a/modules/camera/Metadata.h
+++ b/modules/camera/Metadata.h
@@ -28,6 +28,8 @@
     public:
         Metadata();
         ~Metadata();
+        // Constructor used for request metadata templates
+        Metadata(uint8_t mode, uint8_t intent);
 
         // Parse and add an entry
         int addUInt8(uint32_t tag, int count, uint8_t *data);