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: I588a40cd32667aba8e11c663833621b1c441a87a