Only display single line for title

When a malicious device admin app’s name includes
a bunch of CRLF characters, it will cause incorrect shows
and selection confusion in Settings Device admin apps listView.

Test: Built the apk and saw single line title.
Bug: 169936038
Change-Id: I0c9d80273ed752c5a83afcad18d67400bcfc1618

packages/SettingsLib/AppPreference/src/com/android/settingslib/widget/AppSwitchPreference.java

@@ -51,6 +51,7 @@ public class AppSwitchPreference extends SwitchPreference {
 
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
+        setSingleLineTitle(true);
         super.onBindViewHolder(holder);
         final View switchView = holder.findViewById(android.R.id.switch_widget);
         if (switchView != null) {