IntentService deprecated in Android 11

[barbeau]

Summary:

https://developer.android.com/guide/components/services says:

The Android framework also provides the IntentService subclass of Service that uses a worker thread to handle all of the start requests, one at a time. Using this class is not recommended for new apps as it will not work well starting with Android 8 Oreo, due to the introduction of Background execution limits. Moreover, it's deprecated starting with Android 11. You can use JobIntentService as a replacement for IntentService that is compatible with newer versions of Android.

Maybe this could be related to #977?

Steps to reproduce:

Look at code

Expected behavior:

IntentService is deprecated and we should review alternatives

Observed behavior:

We use IntentService in:
https://github.com/OneBusAway/onebusaway-android/blob/6cd597042d61fe262888b0d8b8e4ed3ede6ecaf9/onebusaway-android/src/main/java/org/onebusaway/android/directions/realtime/RealtimeService.java