Upgrade some DoH logs from DEBUG to INFO

On userdebug builds, these logs give us some basic insight into
what's going on in DoH, such as connection close, timeout, etc.

[A successful DoH query]
resolv  : res_nmkquery: (QUERY, IN, AAAA)
doh::connection::driver: Handling DNS request on network 100, stats=[recv=54 sent=67 lost=0 rtt=13.788958ms cwnd=12000], peer_streams_left_bidi=83, peer_streams_left_uni=99
doh::connection::driver: Handled DNS request: stream ID 68, network 100, stream_capacity=Ok(11829)
doh::connection::driver: optional_timeout: timeout=Some(92.13807ms), network 100
doh::connection::driver: optional_timeout: timeout=Some(54.99981307s), network 100
doh::connection::driver: Got 468 bytes of response data from stream ID 68 on network 100
doh::connection::driver: optional_timeout: timeout=Some(54.999612183s), network 100
doh::connection::driver: optional_timeout: timeout=Some(54.999871378s), network 100
resolv  : res_doh_send: Https query result: 468, netid=100

[A timed out DoH query]
resolv  : res_nmkquery: (QUERY, IN, AAAA)
doh::connection::driver: Handling DNS request on network 100, stats=[recv=59 sent=73 lost=0 rtt=18.998596ms cwnd=12000], peer_streams_left_bidi=81, peer_streams_left_uni=99
doh::connection::driver: Handled DNS request: stream ID 76, network 100, stream_capacity=Ok(11826)
doh::connection::driver: H3Driver: Timer expired on network 100
doh::connection::driver: optional_timeout: timeout=Some(251.711065ms), network 100
doh::connection::driver: H3Driver: Timer expired on network 100
doh::connection::driver: optional_timeout: timeout=Some(503.921438ms), network 100
doh::connection::driver: H3Driver: Timer expired on network 100
doh::connection::driver: optional_timeout: timeout=Some(1.007884907s), network 100
doh::connection::driver: H3Driver: Timer expired on network 100
doh::connection::driver: optional_timeout: timeout=Some(2.015910358s), network 100
doh::connection::driver: H3Driver: Timer expired on network 100
doh::connection::driver: optional_timeout: timeout=Some(4.02994002s), network 100
doh::connection::driver: H3Driver: Timer expired on network 100
doh::connection::driver: optional_timeout: timeout=Some(8.064315099s), network 100
doh::connection::driver: H3Driver: Timer expired on network 100
doh::connection::driver: optional_timeout: timeout=Some(16.1287871s), network 100
resolv  : res_doh_send: Https query result: -255, netid=100

Bug: N/A
Test: built; checked the logcat
Change-Id: Ie356576a8b5123f3a6a89fddbd3afb3e269a4cfe