Update preference screen title.

- Add missing title to preference screen xml so that they will be used to
set the activity title when the fragment is launched.
- Also updated some incorrect preference screen titles.
- Overrides getTitle() in preference fragments that do not use the
preference screen xml.

Bug: 64564191
Test: blaze-bin/screenshots/android/i18nscreenshots/i18nscreenshots
Change-Id: Id72d5ddf18f0962bc484de8bbd847a2e55d6371e

src/com/android/settings/ScreenPinningSettings.java

@@ -65,6 +65,9 @@ public class ScreenPinningSettings extends SettingsPreferenceFragment
         super.onActivityCreated(savedInstanceState);
 
         final SettingsActivity activity = (SettingsActivity) getActivity();
+        if (usePreferenceScreenTitle()) {
+            activity.setTitle(R.string.screen_pinning_title);
+        }
         mLockPatternUtils = new LockPatternUtils(activity);