Change app colours to look like Android's settings app

<!--

  ~ Copyright © 2013 – 2016 Ricki Hirner (bitfire web engineering).

  ~ All rights reserved. This program and the accompanying materials

  ~ are made available under the terms of the GNU Public License v3.0

  ~ which accompanies this distribution, and is available at

  ~ http://www.gnu.org/licenses/gpl.html

  -->

<vector android:alpha="0.54" android:height="24dp"

    android:viewportHeight="24.0" android:viewportWidth="24.0"

    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">

    <path android:fillColor="#FF000000" android:pathData="M11.8,10.9c-2.27,-0.59 -3,-1.2 -3,-2.15 0,-1.09 1.01,-1.85 2.7,-1.85 1.78,0 2.44,0.85 2.5,2.1h2.21c-0.07,-1.72 -1.12,-3.3 -3.21,-3.81V3h-3v2.16c-1.94,0.42 -3.5,1.68 -3.5,3.61 0,2.31 1.91,3.46 4.7,4.13 2.5,0.6 3,1.48 3,2.41 0,0.69 -0.49,1.79 -2.7,1.79 -2.06,0 -2.87,-0.92 -2.98,-2.1h-2.2c0.12,2.19 1.76,3.42 3.68,3.83V21h3v-2.15c1.95,-0.37 3.5,-1.5 3.5,-3.55 0,-2.84 -2.43,-3.81 -4.7,-4.4z"/>

</vector>