Support multiple cameras in framework.

Change-Id: I081f0fbdca4b633715ea7c3b3d42f8662d27598a
diff --git a/include/camera/Camera.h b/include/camera/Camera.h
index ee2b30c..1beac27 100644
--- a/include/camera/Camera.h
+++ b/include/camera/Camera.h
@@ -113,7 +113,8 @@
 public:
             // construct a camera client from an existing remote
     static  sp<Camera>  create(const sp<ICamera>& camera);
-    static  sp<Camera>  connect();
+    static  int32_t     getNumberOfCameras();
+    static  sp<Camera>  connect(int cameraId);
                         ~Camera();
             void        init();