1. Make the preference dynamically generated in code
2. Make PowerUsageData comparable and add title resource id.
Bug: 34385770
Test: RunSettingsRoboTests
Change-Id: I1b90b4c6cc7107bc146e3554db04cec7641e1cde
The advanced page shows two major parts, one is the battery usage
graph and the other is battery usage list. In usage list, each item
shows basic info of battery usage of one type(e.g. Apps, System)
Bug: 34385770
Test: RunSettingsRoboTests
Change-Id: I22475a489285787afa775af8d5ae3340eff1eed9