am: Don't protect apps that atttempt to grant uri perms.

  If an application is delegating uri permissions through
  the disambiguation dialog, we need to ignore the global
  protected apps concept to make sure the functionality still
  works.

  TODO: Refactor the protected apps implementation to function
  with startActivityAsCaller within the system process and the
  android package.

  TICKET: FEIJ-420

Change-Id: I8ba974a7b25dffe654d32e859064ae86cd9dc7f8
(cherry picked from commit d77a60f9)