Enable account & mailbox sync for exchange

* Now attempts folder list sync for exchange
    (goto folder list and click sync)
* Folder sync never seems to call our callback - bug in EAS side?

* Now attempts mailbox sync
    (go to an EAS mailbox and click sync)

* Cleanup start/stop/error path for IMAP/POP as well
* Small bugfix in SyncManager.java (was calling wrong callback)
* No longer trying to set mailbox read/unread count in IMAP/POP
1 file changed