stagefright: rename usePersistentInputSurface to setInputSurface

and clear persistent surface pointer when MediaRecorder is reset

bug: 21045118
bug: 21045402
Change-Id: Ifd0d6deeb969f2252123929541b30b518cecbf9a
diff --git a/include/media/IOMX.h b/include/media/IOMX.h
index df3aeca..d33d142 100644
--- a/include/media/IOMX.h
+++ b/include/media/IOMX.h
@@ -118,7 +118,7 @@
             sp<IGraphicBufferProducer> *bufferProducer,
             sp<IGraphicBufferConsumer> *bufferConsumer) = 0;
 
-    virtual status_t usePersistentInputSurface(
+    virtual status_t setInputSurface(
             node_id node, OMX_U32 port_index,
             const sp<IGraphicBufferConsumer> &bufferConsumer) = 0;