SQL Server 2014 Avaliability Group DbMgrPartnerCommitPolicy
For future readers :
DbMgrPartnerCommitPolicy::SetSyncState:00000003BFC0B0E0:1
The last integer describes the AG state
0 - Not Joined to AG
1 - Not Synchronized
2 - Suspended
4 - Synchronized
8 - Redo (redoing log)

Ref : DbMgrPartnerCommitPolicy::SetSyncState May Seem More Mysterious than It Actually Is