Iceshrimp improvements

[Jacocococo]

Port of sk22#1000. The rest of this text is mostly just copied from there.

Lots of improvements to make the experience better on Iceshrimp. These include:

• Improvements to emoji reactions
  • Enable reactions by default
  • Synchronize favorites and reacts (Except for on Iceshrimp.NET)
  • Respect max amount of reactions on a post (works for Glitch-Soc too)
  • Disable reaction buttons for remote reactions
  • Place the UI's reaction in the same place as the server has placed it
  • Fix bug where a new Unicode reaction wouldn't show up in the UI before refresh if the status previously had no reactions (not specific to Iceshrimp)
• Improved quote posts support
  • It's now actually possible to quote a post from Iceshrimp
  • Adds another check to remove the RE: text
  • Fixes crash when viewing a quote post
  • Shows notification of the user's post getting quoted properly
• Improved announcement display
  • Don't show emoji reactions
  • Correctly show edit time
• Properly use content types since only MFM is supported
  • Disable settings by default and hide them (users will have to log out and in again to disable the setting if they want to. It shouldn't really matter, but that could possibly solve a problem someone is having after updating)
  • Allow all content types to lower risk of unexpected crashes
  • Set MFM as the default content type
• Hide unsupported features
  • Account notify (Except for on Iceshrimp.NET. Doesn't seem to be supported on the server yet but likely will in the future)
  • News discovery
  • Language selector (Except for on Iceshrimp.NET. Not sure if it works currently, but I at least expect it to do in the future)
  • Filter settings (Except for on Iceshrimp.NET)
• Load instance info immediately on main thread instead of in the background (too useful for it to be worth the unnoticable difference in app opening time)
• Fix constant app crash after being logged into an Iceshrimp account for some time (see 86b6adf)
• Moshidon: Add proper padding between emoji reactions display and extended footer if show dividers is on

[FineFindus]

Thanks for the PR.
I think it would be a good idea to add comments explaining some of the server-specific changes, e.g. //hide y because x doesn't support property z. Makes it easier to understand why the code is like this when reading it later :)

[LucasGGamerM]

I'm just thinking of how it's gonna be to merge this after I deal with the upstream merging 🤔

[Jacocococo]

I'm just thinking of how it's gonna be to merge this after I deal with the upstream merging 🤔

I just tried pulling all of mastodon-android/master into my branch and none of my changes seemed to make the merging process noticeably more difficult (than it already is)

Close to all of the changes in this PR only build upon code that was already existent in Moshidon. More than a third of the changes are in a single file that doesn't even exist in mastodon-android (EmojiReactionsStatusDisplayItem). Almost this entire PR is simply making it so features already implemented to be used by i.e. Glitch or Akkoma instances also work well for Iceshrimp users

[LimePotato]

would it be possible to use the mastodon post visibility picker over the pleroma one as well? local-only posting does not function due to moshidon detecting it as pleroma.

[Jacocococo]

This would seemingly already have been fixed by a554059