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/services/surfaceflinger/LayerBase.h b/services/surfaceflinger/LayerBase.h
index 46713fa..7a9471e 100644
--- a/services/surfaceflinger/LayerBase.h
+++ b/services/surfaceflinger/LayerBase.h
@@ -243,8 +243,8 @@
     virtual void onPostComposition() { }
 
     /**
-     * Updates the SurfaceTexture's transform hint, for layers that have
-     * a SurfaceTexture.
+     * Updates the GLConsumer's transform hint, for layers that have
+     * a GLConsumer.
      */
     virtual void updateTransformHint(const sp<const DisplayDevice>& hw) const { }