Force close_crash happened when add new mail from Email widget

rootcause: The widget store a email account id when Launcher add a email widget.
If the email account is removed, but the widget acount id is still exsit.

Change-Id: I4b18e19506ed6afe5d24ab44585cd58c37e221f0
Author: Erjun Ding <erjunx.ding@intel.com>
Signed-off-by: Erjun Ding <erjunx.ding@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 36835