Update shim method to the updated API name

Rename ConnectiivityManager.registerDefaultNetworkCallbackAsUid
to registerDefaultNetworkCallbackForUid as the feedback from
API review. Update the usage in shim correspondingly.

Bug: 185246410
Test: atest FrameworksNetTests
Test: atest CtsNetTestCasesLatestSdk
Change-Id: I3a8b5020d0bd1c95e3a75910322301b5596be823
Merged-In: I3a8b5020d0bd1c95e3a75910322301b5596be823