feat: support map projection between view and geographic coordinates

[Samo8]

Adding support for Projection

Fixes #330

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I signed the CLA.
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation
• I added new tests to check the change I am making
• All existing and new tests are passing.

[Samo8]

@jokerttu There is small issue with android.graphics.Point (docs). Unfortunately coordinates are integers not decimal. This can cause small deviations because there is some rounding done.
I didn't find some solution that will make this work with 100% accuracy.

On iOS it's fine because iOS API has decimals.
Thanks.

[illuminati1911]

I would personally maybe prefer to have small labels on top of the map that show both coordinates constantly instead of this kind of a popup that opens/closes and changes it's text content. Easier to test and takes up less screen space.

That being said this is just personal preference and I don't think change here is really necessary. It's example app at the end of they day and it works well. Just something to think about.

[Samo8]

updated

[illuminati1911]

Looks pretty good to me all around. Please add some integration tests and then it should be good to go. 👍

[Samo8]

Looks pretty good to me all around. Please add some integration tests and then it should be good to go. 👍

Added integration tests, updated example. Thanks.