Add corresponding permission to allow tether offload to update
network usage through new API that requires UPDATE_DEVICE_STATS
permission.
This is the minimum permission that required to update network
usage with the new system api.
Test: atest FrameworksNetTests OffloadControllerTest TetheringTest
Bug: 130855321
Change-Id: I9c0c86e20d4797ea3570feed741be3a07f839c7d