Extreme battery saver: Allow lowering framerate for experiments.

Bug: 68769804
Test: manual
Change-Id: Ic0c95f32c7ba6d86a997997e480e6d8a5f228f25
diff --git a/libs/hwui/Properties.h b/libs/hwui/Properties.h
index 9c30e4a..af4b694 100644
--- a/libs/hwui/Properties.h
+++ b/libs/hwui/Properties.h
@@ -255,6 +255,9 @@
 
     static bool skpCaptureEnabled;
 
+    // For experimentation b/68769804
+    ANDROID_API static bool enableRTAnimations;
+
     // Used for testing only to change the render pipeline.
     static void overrideRenderPipelineType(RenderPipelineType);