Refactor surfacefinger Layer::latchBuffer

Take out Rejecter class declaration out of the method. This
increases readability and shortens latchBuffer method by 200 lines.

Change-Id: I8b07c63f8ed6408e68d5696d0666e65a3b14bd4c
diff --git a/services/surfaceflinger/Android.mk b/services/surfaceflinger/Android.mk
index ba036dd..7135ed3 100644
--- a/services/surfaceflinger/Android.mk
+++ b/services/surfaceflinger/Android.mk
@@ -15,6 +15,7 @@
     GpuService.cpp \
     Layer.cpp \
     LayerDim.cpp \
+    LayerRejecter.cpp \
     MessageQueue.cpp \
     MonitoredProducer.cpp \
     SurfaceFlingerConsumer.cpp \