Merge "Remove res_init.* and move its functionalities into ResState" am: 8bc89313 am: 00f080e3 am: 2d80a866

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/1517567

Change-Id: I6e47e2628ee218da307e066664888f79f0d5b832