Testing to see if waiting for resume will fix flaky tests.

Similar to how AbstractLauncherUITest waits for resume after
switching state to Normal.

Bug: 202735477
Test: presubmit
Change-Id: I61834d32f8005491a4e14a354dc0097b05267f7b
diff --git a/tests/src/com/android/launcher3/ui/WorkProfileTest.java b/tests/src/com/android/launcher3/ui/WorkProfileTest.java
index aca5951..3a338d1 100644
--- a/tests/src/com/android/launcher3/ui/WorkProfileTest.java
+++ b/tests/src/com/android/launcher3/ui/WorkProfileTest.java
@@ -93,6 +93,7 @@
         waitForLauncherCondition("Launcher didn't start", Objects::nonNull);
         waitForStateTransitionToEnd("Launcher internal state didn't switch to Normal",
                 () -> NORMAL);
+        waitForResumed("Launcher internal state is still Background");
         executeOnLauncher(launcher -> launcher.getStateManager().goToState(ALL_APPS));
         waitForStateTransitionToEnd("Launcher internal state didn't switch to All Apps",
                 () -> ALL_APPS);