DO NOT MERGE: Fix LauncherAppsEnumerationTests#callback_unsuspended_visibleReceives

With Ie06df12ff3da6cf209fb3149e6aa80b0e63ce56e, broadcasts are not
sent if the package being unsuspended didn't have a single
suspending package. And this test was written when the original bug
was introduced, so it tests the wrong behavior.

This makes the test suspend the package first before testing the
unsuspend.

Bug: 232319688
Bug: 247413640

Test: atest LauncherAppsEnumerationTests

Merged-In: I3275a06e9c3c95acac413cb485250333ea3548fb
Change-Id: I3275a06e9c3c95acac413cb485250333ea3548fb