New icon to dump heap information and share it.

Alternatively,
  $ adb shell am start -n <pkg>/com.android.launcher3.MemoryDumpActivity

Change-Id: I8c615ec3abffaf6ad693c93bdf569550d8f97298
diff --git a/res/values/config.xml b/res/values/config.xml
index d4f8185..e65818f 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -90,4 +90,7 @@
     <integer name="hotseat_all_apps_index">2</integer>
     <!-- must be between 0 and 100 -->
     <integer name="hotseat_item_scale_percentage">100</integer>
+
+    <!-- Memory debugging, including a memory dump icon -->
+    <bool name="debug_memory_enabled">true</bool>
 </resources>