[ipsec-doze] Add fchown capabilities, and fw rules

Add some firewall rules to allow doze mode packets to be sent/received
on ESP & no-socket packets. No-socket packets are no security risk
because they are either forwarded, going to be forwarded, or will be
dropped at routing tables (unless they are ESP).

Bug: 62994731
Test: New tests added, run
Change-Id: I2d8704498b564403d94123e4938091dee8fb98c1
13 files changed