Update MapBox to 5.1.4
Update MapBox to 5.1.4

This doesn't introduce any regressions as far as I can tell, but also
doesn't fix the Chromebook crash (T164317).  A change was recently merged
that they claim will fix it, but I guess that's going in the next minor
version.

https://github.com/mapbox/mapbox-gl-native/blob/master/platform/android/CHANGELOG.md

Change-Id: I77b3690d9b38af569bda88864b4630cd6f1464d9

dbrant/apps-android-wikipedia,dbrant/apps-android-wikipedia,dbrant/apps-android-wikipedia,wikimedia/apps-android-wikipedia,wikimedia/apps-android-wikipedia,dbrant/apps-android-wikipedia,wikimedia/apps-android-wikipedia,wikimedia/apps-android-wikipedia,dbrant/apps-android-wikipedia