-Add a mojo service to get video frames from the camera through an android service

mojo/services/camera/public/interfaces/camera.mojom

Index: mojo/services/camera/public/interfaces/camera.mojom
diff --git a/mojo/services/camera_roll/public/interfaces/camera_roll.mojom b/mojo/services/camera/public/interfaces/camera.mojom
similarity index 83%
rename from mojo/services/camera_roll/public/interfaces/camera_roll.mojom
rename to mojo/services/camera/public/interfaces/camera.mojom
index 850da78f654a6594868e806bd4a30e7f7a782684..b7cc5cb7184b568bf79d49077baf861a2ca164c5 100644
--- a/mojo/services/camera_roll/public/interfaces/camera_roll.mojom
+++ b/mojo/services/camera/public/interfaces/camera.mojom
@@ -28,3 +28,10 @@ interface CameraRollService {
   // if such an index is out-of-bounds.
   GetPhoto(uint32 index) => (Photo? photo);
 };
+
+// |CameraService| provides access to the device's camera video stream.
+interface CameraService {
+  // Returns the most recent frame captured by the device's camera
+  // in preview mode.
+  GetLatestFrame() => (handle<data_pipe_consumer>? content);
+};