Add more unit test for doh

Test: atest doh_unit_test
Bug: 155855709
Change-Id: Ieb1fa2ed1965e7c93211e00e1d285544dc4ed3a3
Merged-In: I616933251aec49c60c850198c0594861009c2bb8
diff --git a/Android.bp b/Android.bp
index d729d88..7ce84d9 100644
--- a/Android.bp
+++ b/Android.bp
@@ -289,6 +289,13 @@
 }
 
 filegroup {
+    name: "resolv_rust_test_config_template",
+    srcs: [
+        "resolv_rust_test_config_template.xml",
+    ],
+}
+
+filegroup {
     name: "resolv_test_config_template",
     srcs: [
         "resolv_test_config_template.xml",
@@ -368,6 +375,9 @@
     edition: "2018",
     test_suites: ["general-tests"],
     auto_gen_config: true,
+    // Used to enable root permission for the test.
+    // TODO: remove after 'require_root' is supported in rust_test.
+    test_config_template: ":resolv_rust_test_config_template",
     rustlibs: [
         "libandroid_logger",
         "libanyhow",