Fix ListPreference title cutted off problem

- Remove the code of the setSingleLineTitle.
- Remove the additional code in the SpellCheckerPreference.

Fixes: 306795084
Test: manual test
Change-Id: Ib279496b9456cab9df9c542b8fee455d28ef01d9

src/com/android/settings/CustomListPreference.java

@@ -37,7 +37,6 @@ public class CustomListPreference extends ListPreference {
 
     public CustomListPreference(Context context, AttributeSet attrs) {
         super(context, attrs);
-        setSingleLineTitle(true);
     }
 
     public CustomListPreference(Context context, AttributeSet attrs, int defStyleAttr,