Benchmark-mode for macrobench

Adds googlebench output format support
Adds offscreen rendering for >60fps benchmarking
Adds 'all' alias to run all registered TestScenes

Change-Id: I2579e40f2f4c941bfbd90c75efbee384c08a116b
diff --git a/libs/hwui/Properties.cpp b/libs/hwui/Properties.cpp
index 6f68c2b..112ba11 100644
--- a/libs/hwui/Properties.cpp
+++ b/libs/hwui/Properties.cpp
@@ -65,6 +65,7 @@
 bool Properties::sDisableProfileBars = false;
 
 bool Properties::waitForGpuCompletion = false;
+bool Properties::forceDrawFrame = false;
 
 bool Properties::filterOutTestOverhead = false;