Remove/fix STOPSHIP comments

* Remove the drag_background drawable as it is not referenced
* Correct icons for menus have been submitted; remove STOPSHIP
* Reverse target location check in MailboxListItem to fail fast if we do
  not have a "down" touch event; STOPSHIP not necessary, removed
* Remove 10dip guard on mailbox list; this is near impossible to trigger

bug 3335078
bug 3335096
bug 3335065

Change-Id: I4bcc42ee03502c8a5c44d431e935dff92a648fb1
1 file changed