Merge "Remove title from top_level_settings."

<PreferenceScreen

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:settings="http://schemas.android.com/apk/res-auto"

    android:key="top_level_settings"

    android:title="@string/settings_label_launcher">

    android:key="top_level_settings">

    <Preference

        android:key="top_level_network"