Fix starting the activity with incorrect pid/uid

Starts the activity in the same thread vs. in the frame callback.

Bug: 406763872
Test: am start-in-vsync
Flag: EXEMPT bugfix
Change-Id: Ida3648fb8a4c7e4801b024622f7e5f1110184a0d

(cherry picked from commit fca9c788b3364017b021544ec9594b43c93c9d29)

Change-Id: Ifb5e130a1e73e076233b6d78e2ab7bc118dce35b
1 file changed