It works now, but I don’t know why. I did
meshtastic_windows.exe --ch-shortfast
on both radios to change it from LongSlow. Eventually I figured out that that resets the HAM mode, so with
meshtastic_windows.exe --set-ham K2GGE-1
on both and the radios started communicating. Then I tried the Android app to see if I could now connect and found it was already connected! I was able to send a message to the other radio. Joy!
So maybe LongSlow prevented Android from connecting? To test that I changed back to LongSlow (and set-ham) and now Android is also connected in LongSlow.
Perhaps cycling through these settings cleared out some other setting I had made that was preventing Android from connecting? Dunno. It’s a mystery.