Really allow NetworkAgent immutable updates to NetworkCapabilities

This patch completes commit bae105a5ccd11430bab14721d1325e2303a673da to
really allow updates of immutable capabilities to NetworkCapabilities of
NetworkAgents by using satisfiedByImmutableNetworkCapabilities instead
satisfiedByNetworkCapabilities.

Bug: 64125969
Test: runtest frameworks-net
Change-Id: I9beeb623792f0ee31abcd4ba9d0ba2451304fb2e
1 file changed