Rename ISurfaceTexture and SurfaceTexture

The C++ class names don't match what the classes do, so rename
ISurfaceTexture to IGraphicBufferProducer, and SurfaceTexture to
GLConsumer.

Bug 7736700

Change-Id: Ia03e468888025b5cae3c0ee1995434515dbea387
diff --git a/libs/gui/ISurface.cpp b/libs/gui/ISurface.cpp
index c2ea183..8c25f45 100644
--- a/libs/gui/ISurface.cpp
+++ b/libs/gui/ISurface.cpp
@@ -23,7 +23,7 @@
 #include <binder/Parcel.h>
 
 #include <gui/ISurface.h>
-#include <gui/ISurfaceTexture.h>
+#include <gui/IGraphicBufferProducer.h>
 
 namespace android {
 
@@ -37,11 +37,11 @@
     {
     }
 
-    virtual sp<ISurfaceTexture> getSurfaceTexture() const {
+    virtual sp<IGraphicBufferProducer> getSurfaceTexture() const {
         Parcel data, reply;
         data.writeInterfaceToken(ISurface::getInterfaceDescriptor());
         remote()->transact(GET_SURFACE_TEXTURE, data, &reply);
-        return interface_cast<ISurfaceTexture>(reply.readStrongBinder());
+        return interface_cast<IGraphicBufferProducer>(reply.readStrongBinder());
     }
 };