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
Merged-In: Ib145ca7f36dcbee6ef47d09862a181fc04a28f03
(cherry picked from commit bf091021)

Change-Id: I98449430ca5b11f5a62ba43683663bd82650e817