Do not require BAL opt-in for Launchers

Launchers can be assumed to have the user's consent and need to launch
activities, so we grant their privileges by default without requiring the
launcher to opt in every single time.
This fixes multiple test that start when BAL priviliges by sender are restricted,

Test: atest android.content.pm.cts.shortcutmanager.ShortcutManagerStartShortcutTest
Bug: 265916225
Change-Id: I6c49cf5ec6af3c609f517f51836507dfca7aec50