split ComposerService out of SurfaceComposerClient.h

Change-Id: I1eb691f7ca263d5895d871ab675bb5826e0323c6
diff --git a/libs/gui/SurfaceTextureClient.cpp b/libs/gui/SurfaceTextureClient.cpp
index 3d47f05..691b52d 100644
--- a/libs/gui/SurfaceTextureClient.cpp
+++ b/libs/gui/SurfaceTextureClient.cpp
@@ -23,6 +23,8 @@
 
 #include <utils/Log.h>
 
+#include <private/gui/ComposerService.h>
+
 namespace android {
 
 SurfaceTextureClient::SurfaceTextureClient(