Add AppBatteryPreference for Spa

This is used in new App Info page.

To try:
1. adb shell am start -n com.android.settings/.spa.SpaActivity
2. Go to Apps -> All apps -> [One App] -> App battery usage

Bug: 236346018
Test: Unit test & Manual with Settings App
Change-Id: I4784e42f230534d8d843ec00de51032baffcb7e2