Library licenses without proprietary dependency

[Wv5twkFEKh54vo4tta9yu7dHa3]

As part of fixing #50, this removes the dependency on the proprietary Google Licenses activity, and replaces it with a free implementation

Related to #37

Please note, this was inspired by mozilla-mobile/fenix#13767 and as such the LicensesActivity is under the MPL 2.0. I have reached out to the author to ask for a copy of the corresponding file under Apache 2.0, but even if that ends up not being possible it should also be noted that the MPL is compatible with Apache 2.0.

[daniel-eder]

@Wv5twkFEKh54vo4tta9yu7dHa3 thank you for your contribution!
@oleksandrsarapulovgl From a licensing perspective, the MPL-licensed file is OK. Not sure if #50 is in-scope (especially as this is only a template app and not directly in use), I triggered clarification for this.

[Wv5twkFEKh54vo4tta9yu7dHa3]

Oh, is this supposed to be used by member states and re-branded? That's disappointing, I would've liked an EU-branded app for once :(

[daniel-eder]

Oh, is this supposed to be used by member states and re-branded? That's disappointing, I would've liked an EU-branded app for once :(

Ultimately this is up to the European Commission, but the current status is indeed that the apps here are ready-to-use templates that member states can re-brand or partially include in existing national COVID19-related apps.

That said, I can still see it being useful to think about #50 and this PR, so others can build upon this, but we have to verify if it is in scope as this is not up to us

[Wv5twkFEKh54vo4tta9yu7dHa3]

Thanks for your reply.

This PR should be merged regardless of #50 I would say, since it would be somewhat of a shame to have a proprietary dependency on GMS for no reason ☺️

[gilbsgilbs]

FYI, I'm the original contributor of this activity/fragment in Mozilla Fenix (https://github.com/mozilla-mobile/fenix/pull/13767/files), and I also released a copy of this code into public domain, so license shouldn't be a concern for anyone: https://gist.github.com/gilbsgilbs/36724e7752c55ebb99bf9e59b1c96706 .

As for #50 being in-scope or not, I still think it'd be better to not include proprietary dependencies (especially from Google) in a template that may spread across EU, regardless of whether or not this app is expected to land into third-party stores.

[gilbsgilbs]

Thanks 💙.