i use an android app called keymapper (by sds100) that lets you remap the volume buttons so that a long press will change the track.

my wired earbuds only have 1 button on the in-line remote but the app can detect the button being pressed whether its a single, double tap or long press, and you can just assign whatever you want to them

Technically TRS only has one ring (Tip Ring Sleeve) and TRRS only has two rings (Tip Ring Ring Sleeve). It does have four separate contacts though, separated by bands.