More benchmark tweaks

Bug: 187718492
Test: this
Change-Id: Ie0cad91e1c7d1a02704fc4b1007ba2c28cb2b3e7
diff --git a/libs/hwui/renderthread/RenderThread.h b/libs/hwui/renderthread/RenderThread.h
index afd5750..5021085 100644
--- a/libs/hwui/renderthread/RenderThread.h
+++ b/libs/hwui/renderthread/RenderThread.h
@@ -151,6 +151,7 @@
 
     sk_sp<Bitmap> allocateHardwareBitmap(SkBitmap& skBitmap);
     void dumpGraphicsMemory(int fd, bool includeProfileData);
+    void getMemoryUsage(size_t* cpuUsage, size_t* gpuUsage);
 
     void requireGlContext();
     void requireVkContext();