Got excited, though it's weird I see no Simple Scrobbler updates (that's impossible? it's definitely not being maintained). Unfortunately PA update did not improve situation.
I see on the Simple Scrobbler deprecation notice(there is something official on github) there is a recommended open alternative:
Pano Scrobbler https://play.google.com/store/apps/details?id=com.arn.scrobble However -- there is a weird blocking requirement to have an Last.FM account to set it up (tho it supposedly works after with LibreFM etc) because it's heavily built around Last.FM things, so if you use Last.FM that's probably a good bet, but out of luck otherwise still.