Add the setPreviewWindow camera HAL API to the camera stub.

Change-Id: Ic669f9d5f5ae8f1fe5bd055f55aa4a18fa6d84cd
diff --git a/services/camera/libcameraservice/CameraHardwareStub.cpp b/services/camera/libcameraservice/CameraHardwareStub.cpp
index b3e0ee6..07b5a37 100644
--- a/services/camera/libcameraservice/CameraHardwareStub.cpp
+++ b/services/camera/libcameraservice/CameraHardwareStub.cpp
@@ -101,9 +101,9 @@
     mFakeCamera = 0; // paranoia
 }
 
-sp<IMemoryHeap> CameraHardwareStub::getPreviewHeap() const
+status_t CameraHardwareStub::setPreviewWindow(const sp<ANativeWindow>& buf)
 {
-    return mPreviewHeap;
+    return NO_ERROR;
 }
 
 sp<IMemoryHeap> CameraHardwareStub::getRawHeap() const