Return information about whether overlays are disabled.

Change-Id: I85ae42e9f28461f5142cc6b3c8e25ff3f195805a

Author: Dianne Hackborn

services/surfaceflinger/SurfaceFlinger.cpp

@@ -1753,6 +1753,7 @@ status_t SurfaceFlinger::onTransact(
                 reply->writeInt32(0);
                 reply->writeInt32(mDebugRegion);
                 reply->writeInt32(mDebugBackground);
+                reply->writeInt32(mDebugDisableHWC);
                 return NO_ERROR;
             case 1013: {
                 Mutex::Autolock _l(mStateLock);