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

1 files changed, 0 insertions, 2 deletions

diff --git a/PrivateDnsConfiguration.cpp b/PrivateDnsConfiguration.cpp
index 182a5ac6..7d9e82a9 100644
--- a/PrivateDnsConfiguration.cpp
+++ b/PrivateDnsConfiguration.cpp
@@ -350,7 +350,5 @@ bool PrivateDnsConfiguration::needsValidation(const PrivateDnsTracker& tracker,
     return (iter == tracker.end()) || (iter->second == Validation::fail);
 }
 
-PrivateDnsConfiguration gPrivateDnsConfiguration;
-
 }  // namespace net
 }  // namespace android