CORE-536: In SystemCallbackCoordinator use the System listenerQueue on event handling
CORE-536: In SystemCallbackCoordinator use the System listenerQueue on event handling

breadwallet/breadwallet-core,breadwallet/breadwallet-core,breadwallet/breadwallet-core,breadwallet/breadwallet-core,breadwallet/breadwallet-core,breadwallet/breadwallet-core