More benchmark tweaks

Bug: 187718492
Test: this
Change-Id: Ie0cad91e1c7d1a02704fc4b1007ba2c28cb2b3e7
diff --git a/libs/hwui/renderthread/CacheManager.h b/libs/hwui/renderthread/CacheManager.h
index 0a6b8dc..713ea99 100644
--- a/libs/hwui/renderthread/CacheManager.h
+++ b/libs/hwui/renderthread/CacheManager.h
@@ -47,6 +47,7 @@
     void trimMemory(TrimMemoryMode mode);
     void trimStaleResources();
     void dumpMemoryUsage(String8& log, const RenderState* renderState = nullptr);
+    void getMemoryUsage(size_t* cpuUsage, size_t* gpuUsage);
 
     size_t getCacheSize() const { return mMaxResourceBytes; }
     size_t getBackgroundCacheSize() const { return mBackgroundResourceBytes; }