Add netd binder and resolver API

- Add a path for ConnectivityService to pass log severity to resolver.
- Remove persist system property. No more keep logging severity setting
after reboot.

Bug: 129108902
Test: full build, flash ROM
Test: atest resolv_integration_test
Change-Id: I66a065dcd034c88ed8e0b5f24f53382d355735bd
8 files changed