Add support for shaarli2mastodon

[angristan]

I opened #34 a year ago and I still use Shaarli and Mastodon every day.

I recently started learning Java at school as well as a little bit of Android development.

Since I am a bit more comfortable with the language and the structure of Android apps, I tried to fix this issue myself!

Overall it's a copy/paste of the shaarli2twitter feature. I was able to test it on my phone on Pie and can confirm it's perfectly working! 🎉

I hope I did not make hideous stuff and that you will accept my PR 😄

[angristan]

PS: Android Studio made all these changes to app/app.iml when bulding the app. I don't know if I should have committed them or not.

[angristan]

This is how it looks:

[dimtion]

First of all, I would like to give you a big shout-out for this pull request. Since I don't have a Mastodon account, I did not take the time to fix this issue that is awaited by a lot of people.

I have read the PR, it looks good to me, I'll try to test and merge it if I have more time tomorrow.

Thanks again!

[dimtion]

Oh, yeah I have one question: is "toot" the equivalent to "tweet" in Mastodon vocab?

[angristan]

Awesome! Yes, a toot is the equivalent of a tweet.