Fixing crash when ActivityManager does not have a proper thumbnail

- Fixing issue with hw layers ref count not properly being incremented and decremented
- Preventing message handler from keeping a strong ref to the RecentsService
diff --git a/packages/SystemUI/src/com/android/systemui/recents/Constants.java b/packages/SystemUI/src/com/android/systemui/recents/Constants.java
index 34dd726..62da17e 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/Constants.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/Constants.java
@@ -31,7 +31,7 @@
             // This disables the bitmap and icon caches to
             public static final boolean DisableBackgroundCache = false;
 
-            public static final boolean TaskDataLoader = true;
+            public static final boolean TaskDataLoader = false;
             public static final boolean SystemUIHandshake = false;
             public static final boolean TimeSystemCalls = false;
             public static final boolean Memory = false;
@@ -43,7 +43,7 @@
             public static final boolean TouchEvents = false;
             public static final boolean MeasureAndLayout = false;
             public static final boolean Clipping = false;
-            public static final boolean HwLayers = true;
+            public static final boolean HwLayers = false;
         }
 
         public static class TaskStack {