Revert submission 32704934-model-test-cleanup
Reason for revert: Droidmonitor created revert due to b/406588406. Will be verifying through ABTD before submission.
Reverted changes: /q/submissionid:32704934-model-test-cleanup
Change-Id: Ieeb7f5b5699afeae27f946f060147bb68afc36e5
> Using Sandbox application everywhere to avoid test leaks
> Removing LauncherModelHelper and moving some utility methods to rules and extensions
Bug: 406521480
Flag: EXEMPT test only
Test: Presubmit
Change-Id: I17bd5ec2bdb0fc0cbe02be9c8ee76595effe3f11