Merge "Stop reducing RA advertised ipv6 mtu by 16 - not needed." into rvc-dev...

Merge "Stop reducing RA advertised ipv6 mtu by 16 - not needed." into rvc-dev am: 14756a8c am: 3810d84f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11620914

Change-Id: Iedbbe43b244335656711bd8a7724448260798fd3