[automerger skipped] Merge "Support decoding the new PREF64 RA option." into rvc-dev am: 109ee272e3 am: 8c26d537ab am: cb613dcc86 -s ours

am skip reason: Change-Id I94346939cda910b01ffee75cf8b62a23ec5314cc with SHA-1 d6cc960f48 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/11066313

Change-Id: I76910476df42fa70dfa66d71b3ffad1fd971ab28