Reapply "Set accept_ra_min_lft systctl when starting IPv6 stack."

This reverts commit 64364be83550315d0d30238832473ce04f8dd1db and
reintroduces aosp/2743254.

Reason for revert: This CL should apply cleanly to the November module.

Test: atest NetworkStackIntegrationTests
Change-Id: Ib29663bb2b8efad83eecd724f698ded5031572aa
3 files changed