Clears previously added cross-profile-intents

Clears the old cross-profile intent filters added by the Settings app.
This makes sure we do not have duplicates and also that there are no
outdated intents being forwarded (intents that do not exist any more).

Bug: 16647771
Change-Id: Ief4f7341e3f984b9435a9757bf469e53227ce2bf