Extreme battery saver: Allow lowering framerate for experiments.

Bug: 68769804
Test: manual
Change-Id: Ic0c95f32c7ba6d86a997997e480e6d8a5f228f25
diff --git a/libs/hwui/Properties.cpp b/libs/hwui/Properties.cpp
index d41db63..4243e7e 100644
--- a/libs/hwui/Properties.cpp
+++ b/libs/hwui/Properties.cpp
@@ -59,6 +59,7 @@
 bool Properties::filterOutTestOverhead = false;
 bool Properties::disableVsync = false;
 bool Properties::skpCaptureEnabled = false;
+bool Properties::enableRTAnimations = true;
 
 static int property_get_int(const char* key, int defaultValue) {
     char buf[PROPERTY_VALUE_MAX] = {