Move sensitive field parceling bool to constructor

This addresses API review comments recommending to use a copy
constructor with additional parameters instead of a dedicated method.
makeSensitiveFieldsParcelingCopy becomes LinkProperties(base, true).

Bug: 150877475
Test: atest FrameworksNetTests NetworkStackTests NetworkStackNextTests
Change-Id: Ib145ca7f36dcbee6ef47d09862a181fc04a28f03

tests/net/common/java/android/net/LinkPropertiesTest.java

@@ -1028,7 +1028,8 @@ public class LinkPropertiesTest {
         source.setCaptivePortalApiUrl(CAPPORT_API_URL);
         source.setCaptivePortalData((CaptivePortalData) getCaptivePortalData());
         source.setDhcpServerAddress((Inet4Address) GATEWAY1);
-        assertParcelSane(source.makeSensitiveFieldsParcelingCopy(), 18 /* fieldCount */);
+        assertParcelSane(new LinkProperties(source, true /* parcelSensitiveFields */),
+                18 /* fieldCount */);
 
         // Verify that without using a sensitiveFieldsParcelingCopy, sensitive fields are cleared.
         final LinkProperties sanitized = new LinkProperties(source);