Revert "Revert "hammerhead: Update IPC router security configuration""

 * Yes, we need this :)
 * Sneak in a tiny correction as pointed out by Rashed,
   Service id 501 needs its radio perms back.

This reverts commit 72d7ec49e29584e8056c0f3863047ac689500451.

Change-Id: I916f0fa2a5ecbc8817c1fdcc855bdd1f4d7ee0bd