tree 6504dcdfcb333e77810ba4bcc739b8ce729d5ec0
parent 914656b6f40ba1f8892cccbd91292371cc8dbb4b
author Mike Yu <yumike@google.com> 1596012326 +0800
committer Mike Yu <yumike@google.com> 1596421923 +0000

Clean up gPrivateDnsConfiguration

Use singleton to get an instance of PrivateDnsConfiguration.
The lifetime of the instance is almost aligned with the
DnsResolver service.

Bug: 130686826
Test: cd packages/modules/DnsResolver && atest
Change-Id: Id71f90c7d0508eacd1b20db42408a78d9ea1e03a