Add tests for DhcpErrorEvent

The tests are run both in unit and CTS tests.
Test: atest FrameworksNetTests NetworkStackTestCases
Bug: 129200175

Change-Id: I52976bbbaca26fb317836e8461e372c25df02a22
diff --git a/tests/net/common/Android.bp b/tests/net/common/Android.bp
index 9ee5858..3b2e34a 100644
--- a/tests/net/common/Android.bp
+++ b/tests/net/common/Android.bp
@@ -18,7 +18,7 @@
 // They must be fast and stable, and exercise public or test APIs.
 java_library {
     name: "FrameworksNetCommonTests",
-    srcs: ["java/**/*.java"],
+    srcs: ["java/**/*.java", "java/**/*.kt"],
     static_libs: [
         "androidx.test.rules",
         "frameworks-net-testutils",