Add skip last x sec of podcast just like skip initial already in app

[LenCole]

[mitchdowney]

@LenCole interesting idea...I guess why not! This is low-hanging fruit so I should be able to get to this in the next 1-2 months.

[mitchdowney]

@LenCole sorry I never got around to this :( I actually think this feature won't work until we upgrade our audio player library (react-native-track-player) to v3. It will include a "playerProgressUpdated" callback we need to make a feature like this work reliably in the background. Marking this as blocked for now. #1179