split-up Client.h out of SurfaceFlinger.h

Change-Id: I1993bf23e417163749d886283563a93d50b361b4
diff --git a/services/surfaceflinger/Android.mk b/services/surfaceflinger/Android.mk
index 7d2b75a..5da3a2c 100644
--- a/services/surfaceflinger/Android.mk
+++ b/services/surfaceflinger/Android.mk
@@ -2,6 +2,7 @@
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= \
+    Client.cpp                              \
     EventThread.cpp                         \
     Layer.cpp                               \
     LayerBase.cpp                           \