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: I64520a55f8c09fe6215382ea361c539a9940cba5
diff --git a/services/camera/libcameraservice/CameraService.h b/services/camera/libcameraservice/CameraService.h
index 4dab340..41365a0 100644
--- a/services/camera/libcameraservice/CameraService.h
+++ b/services/camera/libcameraservice/CameraService.h
@@ -81,7 +81,7 @@
         virtual status_t      lock() = 0;
         virtual status_t      unlock() = 0;
         virtual status_t      setPreviewDisplay(const sp<Surface>& surface) = 0;
-        virtual status_t      setPreviewTexture(const sp<ISurfaceTexture>& surfaceTexture) = 0;
+        virtual status_t      setPreviewTexture(const sp<IGraphicBufferProducer>& bufferProducer)=0;
         virtual void          setPreviewCallbackFlag(int flag) = 0;
         virtual status_t      startPreview() = 0;
         virtual void          stopPreview() = 0;