replace getISurfaceTexture by getIGraphicBufferProducer

Change-Id: I723a3863558126f2635a544a39bb3ec88d499c60
diff --git a/services/camera/libcameraservice/Camera2Client.cpp b/services/camera/libcameraservice/Camera2Client.cpp
index b9feaf8..e8b3b7f 100644
--- a/services/camera/libcameraservice/Camera2Client.cpp
+++ b/services/camera/libcameraservice/Camera2Client.cpp
@@ -488,7 +488,7 @@
     sp<IBinder> binder;
     sp<ANativeWindow> window;
     if (surface != 0) {
-        binder = surface->getISurfaceTexture()->asBinder();
+        binder = surface->getIGraphicBufferProducer()->asBinder();
         window = surface;
     }