Fix NullPointerException when running testRequestBackgroundNetwork

aosp/1622675 made handler to be nonnull but
testRequestBackgroundNetwork still pass null as handler when
calling requestBackgroundNetwork, so there is a NullPointerException
when running testRequestBackgroundNetwork.

Bug: 175662146
Test: atest CtsNetTestCases:ConnectivityManagerTest#testRequestBackgroundNetwork
Change-Id: I871992549dfc8cc356221164f1dd49c64f0dae67
1 file changed
tree: 9172e8f024f07098a2cb28dca21892e0619e8f29
  1. tests/
  2. Tethering/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING