[automerger skipped] Backport: Fix the side channel attack by using async DnsResolver API with FLAG_NO_CACHE_STORE am: 91945c82ec am: dc5c4b7224 -s ours am: 658159bac7

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/netd/+/12085954

Change-Id: Iff0350742d0ffec4cfc4c6d675758ebf92c4fae7