NullPointerException if TrackingSettings.setMyBearingTrackingMode(MyBearingTracking.GPS)

[klblk]

Platform: Android
Mapbox SDK version: 4.2.0

Steps to trigger behavior

1. switch off geolocation on device
2. TrackingSettings trackingSettings = mapboxMap.getTrackingSettings(); trackingSettings.setMyBearingTrackingMode(MyBearingTracking.GPS);
3. crash log:
   java.lang.NullPointerException: Attempt to invoke virtual method 'float android.location.Location.getBearing()' on a null object reference at com.mapbox.mapboxsdk.maps.widgets.MyLocationView.setBearing(Unknown Source) at com.mapbox.mapboxsdk.maps.widgets.MyLocationView.setCameraPosition(Unknown Source) at com.mapbox.mapboxsdk.maps.MapView.invalidateCameraPosition(Unknown Source) at com.mapbox.mapboxsdk.maps.MapboxMap.invalidateCameraPosition(Unknown Source) at com.mapbox.mapboxsdk.maps.MapboxMap.access$500(Unknown Source) at com.mapbox.mapboxsdk.maps.MapboxMap$MapChangeCameraPositionListener.onMapChanged(Unknown Source) at com.mapbox.mapboxsdk.maps.MapView.onMapChanged(Unknown Source) at com.mapbox.mapboxsdk.maps.NativeMapView.onMapChanged(Unknown Source) at com.mapbox.mapboxsdk.maps.NativeMapView.nativeJumpTo(Native Method) at com.mapbox.mapboxsdk.maps.NativeMapView.jumpTo(Unknown Source) at com.mapbox.mapboxsdk.maps.MapView.jumpTo(Unknown Source) at com.mapbox.mapboxsdk.maps.MapboxMap$1.run(Unknown Source) at android.os.Handler.handleCallback(Handler.java:733) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5290) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:859) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:675) at dalvik.system.NativeStart.main(Native Method)

not reproduced on 4.2.0-beta4

[tobrun]

@klblk thank you for the report, I patched this up in #7505 for master and also ported this to release-android-v4.2.1in 1730f0d for a possible bugfix release.