Verify service is bound before attempting to disconnect

[ecgreb]

Description

Calling LostApiClientImpl.disconnect() can result in fatal crash if service is not bound.

Steps to Reproduce

Attempt to disconnect client before fully connected.

Lost & Android Version

Lost 2.1.1
Android 6.0.1

10-21 17:26:00.092 24813-24813/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                   Process: com.mapzen.erasermap, PID: 24813
                                                   java.lang.RuntimeException: Unable to pause activity {com.mapzen.erasermap/com.mapzen.erasermap.controller.MainActivity}: java.lang.IllegalArgumentException: Service not registered: com.mapzen.android.lost.internal.FusedLocationProviderApiImpl$2@c390cb5
                                                       at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3381)
                                                       at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3340)
                                                       at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3315)
                                                       at android.app.ActivityThread.access$1100(ActivityThread.java:150)
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
                                                       at android.os.Handler.dispatchMessage(Handler.java:102)
                                                       at android.os.Looper.loop(Looper.java:148)
                                                       at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                                    Caused by: java.lang.IllegalArgumentException: Service not registered: com.mapzen.android.lost.internal.FusedLocationProviderApiImpl$2@c390cb5
                                                       at android.app.LoadedApk.forgetServiceDispatcher(LoadedApk.java:1044)
                                                       at android.app.ContextImpl.unbindService(ContextImpl.java:1337)
                                                       at android.content.ContextWrapper.unbindService(ContextWrapper.java:616)
                                                       at com.mapzen.android.lost.internal.FusedLocationProviderApiImpl$1.onDisconnect(FusedLocationProviderApiImpl.java:59)
                                                       at com.mapzen.android.lost.internal.FusedLocationServiceConnectionManager.disconnect(FusedLocationServiceConnectionManager.java:65)
                                                       at com.mapzen.android.lost.internal.FusedLocationProviderApiImpl.disconnect(FusedLocationProviderApiImpl.java:94)
                                                       at com.mapzen.android.lost.internal.LostApiClientImpl.disconnect(LostApiClientImpl.java:53)
                                                       at com.mapzen.erasermap.model.LostClientManager.disconnect(LostClientManager.kt:55)
                                                       at com.mapzen.erasermap.controller.MainActivity.onPause(MainActivity.kt:217)
                                                       at android.app.Activity.performPause(Activity.java:6403)
                                                       at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1312)
                                                       at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3367)
                                                       at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3340) 
                                                       at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3315) 
                                                       at android.app.ActivityThread.access$1100(ActivityThread.java:150) 
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                       at android.os.Looper.loop(Looper.java:148) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:5417) 
                                                       at java.lang.reflect.Method.invoke(Native Method) 
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)