Attribution for sources not shown on Android

[m0nac0]

As already noted by @mariusvn in #210 (comment), on Android the attribution dialog shown when clicking the info button only lists the MapLibre native SDK, not the sources with an attribution property from the currently shown style.

[m0nac0]

Commented upstream in maplibre/maplibre-native#1630, since this is probably an upstream issue.