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

src/com/android/settings/DividerPreference.java

@@ -25,7 +25,6 @@ public class DividerPreference extends Preference {
 
     private Boolean mAllowAbove;
     private Boolean mAllowBelow;
-    private Boolean mMultiLine;
 
     public DividerPreference(Context context, AttributeSet attrs) {
         super(context, attrs);
@@ -36,9 +35,6 @@ public class DividerPreference extends Preference {
         if (a.hasValue(R.styleable.DividerPreference_allowDividerBelow)) {
             mAllowBelow = a.getBoolean(R.styleable.DividerPreference_allowDividerBelow, false);
         }
-        if (a.hasValue(R.styleable.DividerPreference_multiLine)) {
-            mMultiLine = a.getBoolean(R.styleable.DividerPreference_multiLine, false);
-        }
     }
 
     public DividerPreference(Context context) {
@@ -64,12 +60,5 @@ public class DividerPreference extends Preference {
         if (mAllowBelow != null) {
             holder.setDividerAllowedBelow(mAllowBelow);
         }
-
-        if (mMultiLine != null && mMultiLine) {
-            TextView textView = (TextView)holder.findViewById(android.R.id.title);
-            if (textView != null) {
-                textView.setSingleLine(false);
-            }
-        }
     }
 }