Netd metrics logging for DNS queries

This CL defines a new IDnsEventListener interface and instruments
DnsProxyListener to send log events to it after every DNS query.

Bug: 28204408
Change-Id: I7ef09d8fac2a583fb3dc8e392c4fff5649258b28
4 files changed
tree: 348104205fc45c84cc44350b623757d384b61dbd
  1. client/
  2. include/
  3. server/
  4. tests/
  5. Android.mk
  6. MODULE_LICENSE_APACHE2
  7. NOTICE