Make Print Settings use the new PrintManager.getPrintServices loader

This makes sure that all data always stays up to date.

printer_dropdown_item.xml:
- Reduce the amount of overriden properties

PrintServiceSettingsFragment:
- Instead receiving most data from PrintSettingsFragment have own loader
  and keep data up to date
- Also the updating of the print service state now has a dedicated
  PrintManager call instead of relying of the Settings-ContentObserver
  to transport this information. No more race-conditions, whohoo!

DynamicIndexableContentMonitor:
- To not rewrite too much code the update logic has to live here but the
  reading of the actual data is in PrintSettingsFragment.

Change-Id: I60715cda8952565d7f68cb24fb7da61a37085887

src/com/android/settings/SettingsActivity.java

@@ -131,6 +131,8 @@ public class SettingsActivity extends SettingsDrawerActivity
 
     private static final String LOG_TAG = "Settings";
 
+    private static final int LOADER_ID_INDEXABLE_CONTENT_MONITOR = 1;
+
     // Constants for state save/restore
     private static final String SAVE_KEY_CATEGORIES = ":settings:categories";
     private static final String SAVE_KEY_SEARCH_MENU_EXPANDED = ":settings:search_menu_expanded";
@@ -786,7 +788,7 @@ public class SettingsActivity extends SettingsDrawerActivity
         registerReceiver(mUserAddRemoveReceiver, new IntentFilter(Intent.ACTION_USER_ADDED));
         registerReceiver(mUserAddRemoveReceiver, new IntentFilter(Intent.ACTION_USER_REMOVED));
 
-        mDynamicIndexableContentMonitor.register(this);
+        mDynamicIndexableContentMonitor.register(this, LOADER_ID_INDEXABLE_CONTENT_MONITOR);
 
         if(mDisplaySearch && !TextUtils.isEmpty(mSearchQuery)) {
             onQueryTextSubmit(mSearchQuery);