Add MDnsEventReporter

Add MDnsEventReporter to store the event listener which
register from MDnsService. And they are used to report
mdns event callback.

Bug: 209894875
Test: cd system/netd ; atest
Change-Id: I5f16f57fd0a859b86c888555d6a00d98a646bc1c
9 files changed
tree: 6cc21181925bc5ac955bd0d6b8185a69c8e5c0de
  1. client/
  2. include/
  3. netutils_wrappers/
  4. server/
  5. tests/
  6. .editorconfig
  7. Android.bp
  8. NOTICE
  9. OWNERS
  10. PREUPLOAD.cfg
  11. TEST_MAPPING