Move Dev Tools icon to mipmap

So that the different icon densities don't get stripped out of the build
by aapt, move it to the mipmap directory.

This will ensure that any program using the getDrawableByDensity API can
read any density/size of the icon needed.

Change-Id: I8ee4f7233358be4d68133b20090323251511677a

apps/Development/AndroidManifest.xml

@@ -44,12 +44,12 @@
     <uses-permission android:name="com.google.android.googleapps.permission.GOOGLE_AUTH.YouTubeUser" />
 
     <application android:label="Dev Tools"
-            android:icon="@drawable/ic_launcher_devtools">
+            android:icon="@mipmap/ic_launcher_devtools">
 
         <uses-library android:name="android.test.runner" />
 
         <activity android:name="Development" android:label="Dev Tools"
-            android:icon="@drawable/ic_launcher_devtools">
+            android:icon="@mipmap/ic_launcher_devtools">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />