Fix uninitialized variables in Caches.cpp
Bug #8151401

Change-Id: I221f93de0f1981974f82a094297836dd3fe418bc
diff --git a/libs/hwui/Caches.cpp b/libs/hwui/Caches.cpp
index 7e645d2..1a86b3a 100644
--- a/libs/hwui/Caches.cpp
+++ b/libs/hwui/Caches.cpp
@@ -89,6 +89,9 @@
 
     mFunctorsCount = 0;
 
+    debugLayersUpdates = false;
+    debugOverdraw = false;
+
     mInitialized = true;
 }