Replace calls for updating permission to protect sockets from VPN

NetworkManagementService is deprecated and the calls to NMS are
expected to move to INetd if possible. The implementation for
denyProtect() and allowProtect() redirect the calls to INetd.
The permission enforcement checks the context inside NMS which
is irrevalent to the caller. Thus, this commit acts as a no-op
change.

Bug: 316253925
Test: atest FrameworksNetTests
Change-Id: I2febc7124ef182f544407015bae0765bc55d7cde