Add permission to launch activities on VD

1. Added permission ACTIVITY_EMBEDDING which allows apps to launch
activities on virtual displays.
2. Allow owner of display to launch activities from same app without
permission check to owned display.
3. Added permission checks for launching on secondary displays to
more target task/stack resolution paths in ActivityStarter.

Bug: 63117330
Test: android.server.cts.ActivityManagerDisplayTests
Test: go/wm-smoke
Change-Id: If169a77fb56241e06f7de20168dc38c4b0a217f5