Allow settings preference title to span over multiple lines.

- add singleLineTitle=false to SettingsPreference style, so that it will
not confined the title to a single line.
- remove the custom multi line title from DividerPreference and
MasterSwitchPreference.

Change-Id: I5a78d2cd6ac00c4482e252b0789fd2d265bd9adf
Fix: 34886787
Test: manual

res/values/attrs.xml

@@ -136,7 +136,6 @@
     <declare-styleable name="DividerPreference">
         <attr name="allowDividerAbove" format="boolean" />
         <attr name="allowDividerBelow" format="boolean" />
-        <attr name="multiLine" format="boolean" />
     </declare-styleable>
 
     <!-- For GesturePreference -->

res/values/styles_preference.xml

@@ -31,6 +31,7 @@
     <style name="SettingsPreference">
         <item name="allowDividerAbove">false</item>
         <item name="allowDividerBelow">true</item>
+        <item name="singleLineTitle">false</item>
         <item name="android:layout">@layout/preference_material_settings</item>
     </style>