Refactor the DataUsageBase

1. Create a new DataUsageBaseFragment extending from DashboadFragment
2. Mark DataUsageBase as obsolete
3. Make DataUsageSummary use DataUsageBaseFragment
4. Deprecated DataPlanUsageSummary since it has been used nowhere.

Bug: 72497434
Test: robotest still pass
Change-Id: Ic67a3c90649ae84086dc60b1457566be8727c54b