Update example app (use AndroidX)

[vinicentus]

Use kotlin and swift as languages. Support androidx and web. The name was updated to flutter_map_example since it varied across files, and a version number was added.

I regenerated the app and copied over the dart files etc. Related to #504.

Tested on android. I would appreciate it if someone could test this on ios (and possibly web). I am not completely sure if the assets work on ios...

If you have any suggestions or find any mistakes here, feel free to point them out :)

[vinicentus]

@dpatrongomez have you tested this?

[dpatrongomez]

@dpatrongomez have you tested this?

Yes, It goes nice

[dpatrongomez]

I've tried it and it works perfectly

[RichLewis007]

You've made a lot of nice changes here that will help people who are new to flutter_map to use, understand and modify the Example. Thanks!

[johnpryan]

Some permissions needed to be modified to show a package:location sample, could you see if it's possible to fix the merge conflicts or re-do these steps?

[vinicentus]

I can take a look at it tomorrow.

[vinicentus]

I will create a new pull request, as it is easier for me.

Before I can do that I'd like to know why this line was included:

flutter_map/example/android/build.gradle

Line 11 in eb0cf9c

classpath 'com.google.gms:google-services:4.2.0'

It seems to me as if it is completely unnecessary, as I don't think this library uses any google services, but I could be wrong.
Could @raacker maybe elaborate?

And then there's this commit 6059181, which seems a bit strange to me. Shouldn't this file be automatically generated? Why are these changes needed, and can this be solved by just regenerating the project @johnpryan?

[johnpryan]

Regenerating the XCode project makes sense to me. I'm not sure why google-services is necessary, since package:location doesn't require any Android specific configuration: https://pub.dev/packages/location

[vinicentus]

Okay. I will remove google-services, regenerate the example, and make a new PR.