[automerger skipped] Merge "Stop prefix discovery if an RA prefix arrives in DISCOVERING" into rvc-dev am: 4e17751804 -s ours am: 9ad9d9bd9a -s ours am: 6e794ce875 -s ours
am skip reason: Change-Id I3803fa3d9806848b331c35ee8bac256934bd1f21 with SHA-1 632092bb28 is in history
Change-Id: I6943661de46008f5565887648fd63c9a4fd2819c
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