- Read MOBILE_DATA_PREFERRED_UIDS setting when system ready - Register MOBILE_DATA_PREFERRED_UIDS setting observer - Send uid ranges to netd when update mobile data preferred uids Bug: 171872461 Test: atest FrameworksNetTests Ignore-AOSP-First: Needs cherry-picks Change-Id: I5153c770650594e05dfa8cf230d7381d790f4a55