NPEs in TransportBroker.sendMessageToRouterService() : routerServiceMessenger

[askirk]

Stacktraces:

Fatal Exception: java.lang.NullPointerException
       at com.smartdevicelink.transport.TransportBroker.sendMessageToRouterService(SourceFile:92)
       at com.smartdevicelink.transport.TransportBroker.sendMessageToRouterService(SourceFile:79)
       at com.smartdevicelink.transport.TransportBroker.sendRegistrationMessage(SourceFile:7519)
       at com.smartdevicelink.transport.TransportBroker$1.onServiceConnected(SourceFile:65)

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.IBinder android.os.Messenger.getBinder()' on a null object reference
       at com.smartdevicelink.transport.TransportBroker.sendMessageToRouterService(SourceFile:98)
       at com.smartdevicelink.transport.TransportBroker.sendMessageToRouterService(SourceFile:79)
       at com.smartdevicelink.transport.TransportBroker.sendRegistrationMessage(SourceFile:7519)
       at com.smartdevicelink.transport.TransportBroker$1.onServiceConnected(SourceFile:65)

Occurs at https://github.com/smartdevicelink/sdl_android/blob/master/sdl_android_lib/src/com/smartdevicelink/transport/TransportBroker.java#L92

AND

https://github.com/smartdevicelink/sdl_android/blob/master/sdl_android_lib/src/com/smartdevicelink/transport/TransportBroker.java#L98

In both cases routerServiceMessenger is null. onServiceDisconnected() may be called called after the IF statement passes but before routerServiceMessenger is used.

[askirk]

We can't object lock inside of onServiceConnected an onServiceDisconnected callbacks, so I think simplest fix would be to catch NPE