Correct the calling method in removeDefaultNetworkActiveListener

The removeDefaultNetworkActiveListener should do the
unregisteration but it's incorrectly calling
registerNetworkActivityListener into the ConnectivityService.

Bug: 199753782
Test: atest FrameworksNetTests CtsNetTestCases
Change-Id: I65a2ddc82989d736316d51f5058e707f5b261a82
1 file changed