wifi data usage: Update calling API name

Bug: 213387087
Test: atest -c FrameworksWifiApiTests
Test: atest -c NetworkPolicyManagerServiceTest
Change-Id: I02d7f57de1acfd7b03be0a3e1c957ec1e1c5b4d4
Ignore-AOSP-First: Related API conflict in wifi module, need master first.
4 files changed