fix for new inferred annotations

android.widget.AdapterView.OnItemClickListener.onItemClick(@NotNull android.widget.AdapterView<?> adapterView,  +@NotNull android.view.View view, int i, long l)
android.app.IntentService.onStartCommand(+@NotNull android.content.Intent intent, int flags, int startId)
android.app.Service.onStartCommand(+@NotNull android.content.Intent intent, int flags, int startId)
fix for removed annotations

These methods were annotated as @NotNull (and right now they are also inferred as @NotNull), but annotations supplied with android plugin/android studio are @Nullable, so we removed our @NotNull's.
android.os.Message.obtain()
android.content.res.Resources.getSystem()
Merge pull request #12 from ilya-klyuchnikov/nullability-fix

Nullability fix