[automerger skipped] Fix the side channel attack by using aysnc DnsResolver...

[automerger skipped] Fix the side channel attack by using aysnc DnsResolver API with FLAG_NO_CACHE_STORE am: b9a10a82 am: d6627fbb am: 70e2072b -s ours am: 98cb2fb9 -s ours

am skip reason: Change-Id I37391ffe315b90c0cdfd86888c6bf68b2b89f601 with SHA-1 4eabbe3f is in history

Change-Id: I00e8fcf613bdebd806af6e957722723b876a61a9