ANDROID: refresh ABI following type change

This was the change:

type 'struct ipv6_devconf' changed
  member 'u64 android_kabi_reserved4' was removed
  member 'union { struct { __u8 ra_honor_pio_pflag; __u8 padding4[7]; }; struct { u64 android_kabi_reserved4; }; union { }; }' was added

It was not detected by abidiff as part of the checks at build time.
The problem was detected at presubmit but did not block submission.

Fixes: 8d1ac3f3 ("BACKPORT: Add support for PIO p flag")
Bug: 315069348
Change-Id: I59a4ff580058371be5d05d4ad323ed62c1df9a92
Signed-off-by: Giuliano Procida <gprocida@google.com>