NsdServiceInfo: move test to tests/net

This patch also
  - adds a license plate to NsdServiceInfoTest
  - fixes some formatting and style issues
      package name
      uses of canonical junit asserts
  - update NsdServiceInfoTest to not use the deprecated AndroidTestCase

Bug: 62044295
Bug: 32561414
Test: $ runtest frameworks-net passes
Change-Id: Ie5ebb00172aef4eec19e6ecd2b41c4467901b93d

core/java/android/net/nsd/NsdServiceInfo.java

@@ -30,7 +30,6 @@ import java.nio.charset.StandardCharsets;
 import java.util.Collections;
 import java.util.Map;
 
-
 /**
  * A class representing service information for network service discovery
  * {@see NsdManager}
@@ -43,7 +42,7 @@ public final class NsdServiceInfo implements Parcelable {
 
     private String mServiceType;
 
-    private final ArrayMap<String, byte[]> mTxtRecord = new ArrayMap<String, byte[]>();
+    private final ArrayMap<String, byte[]> mTxtRecord = new ArrayMap<>();
 
     private InetAddress mHost;