Skip cross-user/profile check for start activity pending intents.

A pending intent, even from other users, should start whoever sends it on
whatever user.

Bug: 77601945
Test: Manual test with a work profile calendar widget with a 3p launcher app.
Change-Id: Ie9e08fa07c489f643e8a9d8ec97bc912f8cefbf7
Test: atest /android/pi-dev/cts/hostsidetests/shortcuts/hostside/src/android/content/pm/cts/shortcuthost/ShortcutManagerMultiuserTest.java