92a1c09aa4
BUG: 16219182 We have seen cases where run-away syncs keep going for a very long time. The default behaviour is that a sync can run for as long as it wants once there is nothing else waiting. This CL will change that, and impose a maximum time-limit of 30mins on each sync, after when the op with be cancelled and the adapter will go into back-off. This behaviour will only take effect for syncs that are not initializations, or user-initiated. Change-Id: I1731270ca2a6500b19fc125186aa0b0cd81d1126