Also 40070: Consider storing the list of recommended addons

This implements our own AddonsProvider, which loads the list of
available addons from assets instead of fetching it from an
endpoint. In this list, we replace https-everywhere by
our https-everywhere-eff, so that the EFF one is shown as installed
in the addons list and the AMO one is not displayed.

Also, we hide the uninstall button for builtin addons.

Georg Koppen authored Oct 01, 2020 and Matthew Finkel committed Oct 04, 2020

We make sure our MOZ_BUILD_DATE gets used as a source for showing date
related information on the Fenix about page.

Georg Koppen authored Sep 25, 2020 and Matthew Finkel committed Oct 04, 2020

At the same time we adapt MOZ_BUILD_DATE to our needs where it is
actually used and not in tor-browser-build. This gives us more
flexibility. See: tor-browser-build#40084.

Alex Catarineu authored Sep 22, 2020 and Matthew Finkel committed Oct 04, 2020

With the corresponding android-components patch, this allows all `startActivity`
that may open external apps to be replaced by `TorUtils.startActivityPrompt`.

Alex Catarineu authored Sep 05, 2020 and Matthew Finkel committed Oct 04, 2020

HTTPS Everywhere is installed as a builtin extension and NoScript as
a regular AMO addon. To avoid unnecessary I/O we only install NoScript
the first time, and rely on the browser addon updating mechanism for
keeping up with new versions. This is the same behaviour that was
implemented in the Fennec-based Tor Browser, where it was installed
as a "distribution addon", which also only occurred once.