Bug 899885 - 1/2: B2G RIL - Callback-based worker messaging. Add WorkerMessenger.
Bug 899885 - 2/2: Fix simple, blind sends.
Bug 899885 - 2/2: Fix simple IPC transactions.
Bug 899885 - 2/2: Fix "setPreferredNetworkType".
Bug 899885 - 2/2: Fix "setCellBroadcastSearchList"
Bug 899885 - 2/2: Fix "enumerateCalls".
Bug 899885 - 2/2: Fix "sendMMI", "setCLIR", and "setCallForward".
Bug 899885 - 2/2: Fix "cancelUSSD".
Bug 899885 - 2/2: Fix "queryCallForwardStatus".
Bug 899885 - 2/2: Fix "sendSMS".