Bug 884698 - [Buri][Email]The synchronize option in IMAP account does not work

Fixed LINT error
Merge pull request #11825 from leob2g/Bug_884698_Synchronize_Setting_Hide_For_IMAP_v1train

Bug 884698 - [Buri][Email]The synchronize option in IMAP account does not work. r=asuth, a=blocking-b2g=leo+