Remove donation buttons for Google Play build

app was REJECTED for violating google play store guidelines...!
Apparently we need to kill the patreon/donation links

Avoid awkward button appearance

I promise I'll refactor these buttons soon

Update app identifier (org.languagetransfer), add signing key directives

guess I blanked when I first put com.languagetransfer..!

Update About page

- add "coming soon" section
- reflow "privacy" section
- add styling to the button on the landing screen

Use native queue

this should fix issues on devices that insist on adding next/prev
buttons
I think it'll also help pre-stream future tracks
it also makes for a nicer notification experience
BUT it may be a bit more buggy. we'll seeeeeee

I did have to nix a couple autoplay-related settings. "autoplay only
downloaded tracks" may be possible -- best way to do it is just to only
enqueue contiguous downloaded tracks -- but I don't think it's really
worth (what if the current track isn't downloaded? what if the user
wants to skip to the next track?). we could also just stop playback if
it autoplays to a non-downloaded track, but that has its own issues (and
the audio player may pre-buffer anyway)

Fancier About page

collapsible sections and some rearranging

Slower vanish on motto text

felt like it was snapping out of view before

Add a (really cool) animation on the start screen

joshy's idea

Add adaptive icon

oo looks great

a little off-center but it's a hard fix since the logo itself is a
little off-center