FP2-1667: Fix NOT_RESTRICTED network capability and enforce

Fix NOT_RESTRICTED network capability and enforce it.

With this change:
1. NOT_RESTRICTED should be removed from NetworkRequests that bring up
   special restricted carrier networks (e.g. IMS, FOTA).
2. NetworkRequests without NOT_RESTRICTED require CONNECTIVITY_INTERNAL
   permission to register
3. Binding sockets to networks without NOT_RESTRICTED requires
   CONNECTIVITY_INTERNAL permission

Bug:21900139
Bug:21637535
Change-Id: I5991d39facaa6b690e969fe15dcbeec52e918321
(cherry picked from commit 487ffe7d3d84bf65212158f7098e8a84b5b55e09)
(cherry picked from commit a12044215b1148826ea9a88d5d1102378b13922f)
6 files changed