Add an option allowing to skip wallpaper apps selection.

This commit adds an option to the Settings application, making it
possible to launch a different activity for wallpaper selection

Also removing te intent constant android.settings.WALLPAPER_SETTINGS
The target for this action can't be easily overriden when the
wallpaper target is overriden, which would provide an inconsistant
experience.

Bug: 28554244
Bug: 26688904
Change-Id: I25367fbb4505615351fbad9e1aa1ca88df0cd034

src/com/android/settings/SettingsActivity.java

@@ -410,12 +410,7 @@ public class SettingsActivity extends SettingsDrawerActivity
 
     @Override
     public boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) {
-        // Override the fragment title for Wallpaper settings
-        CharSequence title = pref.getTitle();
-        if (pref.getFragment().equals(WallpaperTypeSettings.class.getName())) {
-            title = getString(R.string.wallpaper_settings_fragment_title);
-        }
-        startPreferencePanel(pref.getFragment(), pref.getExtras(), -1, title,
+        startPreferencePanel(pref.getFragment(), pref.getExtras(), -1, pref.getTitle(),
                 null, 0);
         return true;
     }