DscpPolicyValue: just use '!= null' on original src/dst46 argument

See Lorenzo's comment on aosp/3243843 for why.

Test: TreeHugger, atest CtsNetTestCases:android.net.cts.DscpPolicyTest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I43cab1ee009ec53174fb102ca60ee91b3049857c
1 file changed