Add RA Flags Extension option to match sections am: c5ed7aa6a1

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/3248677

Change-Id: I486e1d924e7e3adb395aa67f7ca9e9494ee7d928
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>