Use AI_ADDRCONFIG for most DNS requests

Not using it doubles the number of DNS lookups for single-stack
networks.
Private DNS hostname resolution still does not use this flag so that we
get all address families in advance, in case of LinkProperties changes.
Bug: b/79811321
Test: manual: Captive portal, 464xlat, networking in apps working
Merged-In: I7037342a93dc48b8e0988e719b9a9a2d5055bcf2
Merged-In: I8ca15fa079cd5ff94e4d9f7e0476504769f9708f
(Clean cherry-pick of pi-dev Ib46756e5e5f8d8d2698c90c5183c368d2d44be7a)

Change-Id: Iedb7a9c5f9caeb66de4505189fca8db91013d844