[cts] fix loading progress callback test for Auto
Loading progress listeners are only registered when there are already at
least one LauncherApps callback registered in LauncherApps service. This
requirement is not met on some Android Auto devices. As a result, the
loading progress tests are failing on those devices.
This tests adds a helper app that registers a LauncherApps callback in
LauncherApps service, before the test app is installed.
BUG: 208176901
Test: atest com.android.tests.loadingprogress.host.IncrementalLoadingProgressTest
Change-Id: I0fb87ac281242a7f1c3a36abed2be35ea25b704b
6 files changed