Avoid reusing a currently active NetID.

There are only a limited number (65526) of NetIDs so the chance for reusing
one exists.  Reusing a currently active NetID will cause problems like netd
failures and overwriting entries in mNetworkForNetId.

bug:16815182

Change-Id: Ib75302beae3179c3f3b90c345cf4d2cf5f4ad2be
2 files changed