Split updateMeteredNetwork{Allow, Deny}List into add and remove

Split the updateXXX methods into an addXXX and removeXXX instead of using
a boolean parameter to indicate whether the uid should be added or removed

Bug: 218494748
Test: atest FrameworksNetTests
Change-Id: I868cf35c8f51b25d8719e618c6c48a5cd642da7f
3 files changed