Everyone is always so dramatic. No, it’s not abandoned. It’s a volunteer project and no one has felt like working on Android stuff lately but nothing is stopping you (the royal ‘you’, not necessarily you specifically) from fixing compiler errors, etc.
As for yabause dynarec, it doesn’t work anywhere (i.e. not just Android) because it’s not PIC-compatible. That is, it can’t work inside of a dynamic library, which all libretro cores are. There are a few things we’ve considered to correct that but none of them are very high priorities (well, one of them is but it’s not mature yet). We’re also waiting to see how Ryphecha’s new Saturn emu shapes up before putting too much more effort into yabause. Likewise, the Reicast 32-bit thing isn’t indicative of any abandonment of Android.
As for priorities, the database and boxart stuff isn’t taking development time away from things you may think are more important. They’re being worked on by other volunteers. But, even if they were taking dev time, it’s not up to you to decide how anyone else spends their freely donated time, so please keep those kinds of comments to yourself.