Add setter/getter methods test for DscpPolicy.Builder

Bug: 220029526
Test: atest FrameworksNetTests CtsNetTestCases
Change-Id: Iba8b1c178f04f3044a47a30085ead0ad36c8c7c8
(cherry picked from commit e849ea4dbea9267977d4a8ac53d367ea14e9c9c4)
Merged-In: Iba8b1c178f04f3044a47a30085ead0ad36c8c7c8
1 file changed