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/SurfaceFlingerConsumer.cpp b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
index a316896..dc9089e 100644
--- a/services/surfaceflinger/SurfaceFlingerConsumer.cpp
+++ b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
@@ -33,7 +33,7 @@
     Mutex::Autolock lock(mMutex);
 
     if (mAbandoned) {
-        ALOGE("updateTexImage: SurfaceTexture is abandoned!");
+        ALOGE("updateTexImage: GLConsumer is abandoned!");
         return NO_INIT;
     }