Camera: implement buffer managment API

Test: compile
Bug: 109829698
Change-Id: I3d95792282da52db9db6fd6a086bbd7b3ff9dca9
diff --git a/services/camera/libcameraservice/device3/Camera3SharedOutputStream.cpp b/services/camera/libcameraservice/device3/Camera3SharedOutputStream.cpp
index fb3ce4c..1c13950 100644
--- a/services/camera/libcameraservice/device3/Camera3SharedOutputStream.cpp
+++ b/services/camera/libcameraservice/device3/Camera3SharedOutputStream.cpp
@@ -138,6 +138,10 @@
         return res;
     }
 
+    // TODO: need to refactor this to support requestStreamBuffers API
+    // Need to wait until processCaptureResult to decide the source buffer
+    // to attach to output...
+
     // Attach the buffer to the splitter output queues. This could block if
     // the output queue doesn't have any empty slot. So unlock during the course
     // of attachBufferToOutputs.