workaround: don't reset compositionType to HWC_FRAMEBUFFER

This workaround a HWC HAL issue in Nexus 7, which causes videos and live
wallpapers to animate slowly.

Bug: 7563862
Change-Id: I87803aaad9751b1fd8392b9732304d4bccec659a
diff --git a/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index 3280229..73794c4 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -811,7 +811,7 @@
         getLayer()->acquireFenceFd = fenceFd;
     }
     virtual void setPerFrameDefaultState() {
-        getLayer()->compositionType = HWC_FRAMEBUFFER;
+        //getLayer()->compositionType = HWC_FRAMEBUFFER;
     }
     virtual void setDefaultState() {
         getLayer()->compositionType = HWC_FRAMEBUFFER;