[Student][MBL-10249] Text submission mobius loop

[CalvinKern]

We don't have a submission service layer yet, but I was imagining that the view would have to start any kind of service as it holds a context. We will have to research the service layer further to get something that meets our needs. I was basing this work off of a JobIntentService, though we may need to use a foreground service so that the actions happen immediately.

Here's the example class I was thinking of:

class SubmissionService: JobIntentService() {

    override fun onHandleWork(intent: Intent) {
        when (intent.action) {
            SubmissionAction.SUBMIT_TEXT_ENTRY.name -> {
                val submission = apiAsync<Submission> {
                    SubmissionManager.postTextSubmission(
                            intent.getParcelableExtra(Const.CANVAS_CONTEXT),
                            intent.getLongExtra(Const.ASSIGNMENT_ID, -1),
                            intent.getStringExtra(Const.MESSAGE),
                            it)
                }
                // TODO: await submission and report back the results
            }
        }
    }

    companion object {
        private const val JOB_ID = 10249

        fun enqueueWork(context: Context, action: SubmissionAction, bundle: Bundle) {
            val intent = Intent(context, SubmissionService::class.java)
            intent.action = action.name
            intent.putExtras(bundle) // TODO: persist the bundle/action in local DB as well?

            enqueueWork(context, SubmissionService::class.java, JOB_ID, intent)
        }
    }
}

enum class SubmissionAction {
    SUBMIT_TEXT_ENTRY
}