Launch work profile entries intent in the profile parent.

The screens don't work as expected if they're launched in the work
profile. The reason for this is that Settings handle the user separately
with an extra inside the intent. I assume launching the actual screen in
a separate user is not supported.

Note that I've also:
1. Added a safeguard to make sure that the "active unlock" code path
   only occurs in the profile parent — it seems preferrable (see
   b/277877289#comment4)
2. Added the user id as an identifier on the intents lauched by the
   entries. The reason we do this is to make sure the user id is taken
   into account in the PendingIntent#equals implementation. This was
   automatically taken care of when launching with the profile context,
   but now that we launch everything in the profile parent context we
   have to make sure the user id is taken into account

Bug: 278665241
Bug: 277877289
Test: manual
Change-Id: Idcaa31cd56ed64768aa8f069d30d2adeb7269099