Created an EasOperation for attachment loading.
This class has been enabled within EmailSyncAdapterService
although it was written as part of the move to EasService.

Change-Id: Ica21e06013925b68faef32624c164f26b94fa6de
(cherry picked from commit b31a8ded3eddd16ce7083ccf6c3d4774bc81b6ca)
8 files changed