[MS71] Remove remaining dependencies in SettingsLib

Test: atest clockwork-settings-robotests
      make RunSettingsRoboTests -j40
      make RunSettingsLibRoboTests
           ROBOTEST_FILTER=DataUsageControllerTest
      make RunSettingsLibRoboTests
           ROBOTEST_FILTER=NetworkCycleChartDataLoaderTest
      make RunSettingsLibRoboTests
           ROBOTEST_FILTER=NetworkCycleDataForUidLoaderTest
      make RunSettingsLibRoboTests
           ROBOTEST_FILTER=NetworkCycleDataLoaderTest
      make RunSettingsLibRoboTests
           ROBOTEST_FILTER=DataUsageUtilsTest
Bug: 204830222
Change-Id: I1e2eaf55f247b1c1104164721d7025f457fcd9a6