Remove memory-debug-related launcher icons & functionality.

Bug: 10441366
Change-Id: I3ddb95839bcd5c07db7e76ce1a28323b499ea30d
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index a78e313..cd3598f 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -104,6 +104,7 @@
         <activity
             android:name="com.android.launcher3.ToggleWeightWatcher"
             android:label="@string/toggle_weight_watcher"
+            android:enabled="@bool/debug_memory_enabled"
             android:icon="@mipmap/ic_launcher_home">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />