Settings: convert to PreferenceFragmentCompat

Change-Id: Ic5509377f06ff147180d3f58a58469afff3ee40f
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
Signed-off-by: Joey <joey@lineageos.org>
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index f6e5693..7efe3a9 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -126,7 +126,8 @@
         <!-- Used to set options -->
         <activity
             android:name="org.lineageos.eleven.ui.activities.SettingsActivity"
-            android:label="@string/menu_settings"/>
+            android:label="@string/menu_settings"
+            android:theme="@style/Eleven.Theme.ActionBar.Overlay"/>
         <!-- Audio Preview -->
         <activity
             android:name=".ui.activities.preview.AudioPreviewActivity"