Default enable DoH feature in T

Bug: 200763585
Bug: 155855709
Test: atest
Change-Id: I1a99889891ef7212aa618198c4840488d23a35d9
diff --git a/util.h b/util.h
index 0c37851..a5eb556 100644
--- a/util.h
+++ b/util.h
@@ -23,6 +23,7 @@
 #include <netinet/in.h>
 
 #include <android-base/properties.h>
+#include <android-modules-utils/sdk_level.h>
 
 #include "Experiments.h"
 
@@ -60,5 +61,8 @@
 }
 
 inline bool isDoHEnabled() {
+    // STOPSHIP(b/200763585): clean up it before T shipping.
+    if (android::modules::sdklevel::IsAtLeastT()) return 1;
+
     return android::net::Experiments::getInstance()->getFlag("doh", 0);
 }