adb connect localhost 5554
adb push "srcfolder" "/sdcard/destfolder"
The transfer takes FOREVER tho. I literally coded the mediastore access in 15 minutes and tested it to make sure its working before a file transfer of 4 albums finished.
I decided to add in a song tab and make the font size slight smaller for the album list and even small for the song list. I'm keeping the list displays simple for now. It's trivial to add more info about the album or song. So here is a screen of the results.
|Dark Matter Dimensions is in there twice because the media store considers the bonus track to be a separate album|