net-utils-services-common - set min_sdk_level to 30

Bug: 178711289
Test: compiles
Change-Id: I8105265b726cb095375191693caa0ccfd7d66276
diff --git a/staticlibs/Android.bp b/staticlibs/Android.bp
index c6a17fe..bcbee07 100644
--- a/staticlibs/Android.bp
+++ b/staticlibs/Android.bp
@@ -162,6 +162,7 @@
         ":framework-annotations",
     ],
     sdk_version: "system_current",
+    min_sdk_version: "30",
     visibility: [
         "//frameworks/base/services/net",
     ],