Converted submission transaction to task (EXPOSUREAPP-2482) (#1429)

...ain/java/de/rki/coronawarnapp/playbook/DefaultPlaybook.kt

...p/src/main/java/de/rki/coronawarnapp/playbook/Playbook.kt

...rki/coronawarnapp/service/submission/SubmissionService.kt

...in/java/de/rki/coronawarnapp/submission/SubmissionTask.kt

...a/de/rki/coronawarnapp/submission/SubmissionTaskModule.kt

...ronawarnapp/transaction/SubmitDiagnosisInjectionHelper.kt

...ronawarnapp/transaction/SubmitDiagnosisKeysTransaction.kt

...arnothers/SubmissionResultPositiveOtherWarningFragment.kt

...rnothers/SubmissionResultPositiveOtherWarningViewModel.kt

...java/de/rki/coronawarnapp/util/di/ApplicationComponent.kt

...de/rki/coronawarnapp/http/playbook/DefaultPlaybookTest.kt

...coronawarnapp/service/submission/SubmissionServiceTest.kt

...warnapp/transaction/SubmitDiagnosisKeysTransactionTest.kt