Make DNS cache lifecycle management explicit

1. Add binder call to support creating cache by netid.
2. revise call flow in res_cache.cpp, not create cache in
   resolv_set_nameservers_for_net().
3. revise Log method in ResolverController.cpp

Bug: 129453995
Test: built, flashed, booted
      system/netd/tests/runtests.sh pass

Merged-In: If1cefa446c83cf9b35763a03d4076fb565c25841
(cherry picked from commit 06cea11b)

Change-Id: I70341f4e5604b111a9672e4eff8b34b8da41f989