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

Merged-In: I2467359511994f9131b40450db9025e2446c1eb3
Merged-In: Ie76d79d376f99de0177302303bcbfcf8358c87a8
(cherry picked from commit aa6cabb3)

Change-Id: I32c662b523c22a95fbcbd150134c878b8c0b618e