split-up Client.h out of SurfaceFlinger.h

Change-Id: I1993bf23e417163749d886283563a93d50b361b4
diff --git a/services/surfaceflinger/LayerBase.cpp b/services/surfaceflinger/LayerBase.cpp
index fe15dc9..893dcb9 100644
--- a/services/surfaceflinger/LayerBase.cpp
+++ b/services/surfaceflinger/LayerBase.cpp
@@ -29,6 +29,7 @@
 #include <hardware/hardware.h>
 
 #include "clz.h"
+#include "Client.h"
 #include "LayerBase.h"
 #include "SurfaceFlinger.h"
 #include "DisplayHardware/DisplayHardware.h"