Better F-Droid install instructions/guide
From IRC discussion here: https://view.matrix.org/room/!HwocBmCtBcHQhILtYQ:matrix.org/?anchor=$1540825905129741LvOIW:matrix.org&offset=30
Turns out installing F-Droid on Android 8.1 with AOSP browser is surprisingly tricky, we should write that down somewhere. We also might want to mention using lineage microg instead as a potentially easier option.