Add test to verify socket close when firewall is enabled

Bug: 270298713
Test: atest CtsNetTestCases
(cherry picked from https://android-review.googlesource.com/q/commit:3ff765537ea070fcef99f92e94a2922bd72f0377)
Merged-In: Ia0cdb5b5b8b8ca180e297e4f10a4e7a389141ae2
Change-Id: Ia0cdb5b5b8b8ca180e297e4f10a4e7a389141ae2
2 files changed