Add ability to open up "Open by default" page directly via intent.

Bug: 74010481
Test: Manually check; sending an Intent with package:// scheme works, if
originated from app of same cert.
Change-Id: I5700e495d259d0197421f40594861bc43e3c154c
(cherry picked from commit 8e2f5a758b7ca44cdafa5a34a9b929e88f1ba9af)
2 files changed