Allow companion apps to start background activities from
PendingIntents (even if they aren't foreground)

And push companion packages to ATMS after the user is
unlocked.

Bug: 129757565
Test: atest WmTests:ActivityStarterTests
Test: manual
Change-Id: Ic76d5c8a3fb096a8caf76dafb6c38212a8506f3a
3 files changed