Add a test for getDefaultNetworkCapabilitiesForUser.

Bug: 172870110
Test: test-only change
Test: new test passes 100 times in a row
Change-Id: I210284578e38cd25b8b95235d3390d5bd66a5a70
Merged-In: I210284578e38cd25b8b95235d3390d5bd66a5a70
(cherry picked from commit cb2feba0fbc5f9a80e3c5cc863ecd56b26113e39)
1 file changed