Rename GroupMemberPickerFragment rawContactsIds

... and all associated ARG and KEY constants to
contactsIds, since that's what it really is. Also

* Share the selection clause between GroupMetaDataLoader
  and GroupListLoader -- we were inconsistent in filtering
  out auto add and favorites groups.

* Remove unsued groups methods:
  - GroupMemberPicker.Listener#onGroupMembersSelected
  - GroupUtil#bindPhoto

* Remove some obsolete comments, fix some others

Test: Manually create and edit editable and read-only groups

Change-Id: I9607225d1a61f8673b7d1461149ae30e253c781d
diff --git a/src/com/android/contacts/GroupMetaDataLoader.java b/src/com/android/contacts/GroupMetaDataLoader.java
index 8cdca2e..26cdb44 100644
--- a/src/com/android/contacts/GroupMetaDataLoader.java
+++ b/src/com/android/contacts/GroupMetaDataLoader.java
@@ -51,10 +51,8 @@
     public final static int DELETED = 8;
 
     public GroupMetaDataLoader(Context context, Uri groupUri) {
-        super(context, ensureIsGroupUri(groupUri), COLUMNS,
-                Groups.ACCOUNT_TYPE + " NOT NULL AND " + Groups.ACCOUNT_NAME + " NOT NULL AND "
-                        + Groups.DELETED + "=0",
-                null, GroupUtil.getGroupsSortOrder());
+        super(context, ensureIsGroupUri(groupUri), COLUMNS, GroupListLoader.DEFAULT_SELECTION, null,
+                GroupUtil.getGroupsSortOrder());
     }
 
     /**