Move battery % down in QS, fix a lot of things

- Move the battery percentage next to the system icons in quick settings
- Always show the percentage, and optionally show the estimate text
based on battery settings
- Move the estimate text into the BatteryMeterView
- Move the fetching of the estimate off of the main thread

Test: visual
Change-Id: Ie37952079b2394c67464f69eb8a2f0089b08875d
Fixes: 119799219 - padding
Fixes: 120996084 - moving estimate fetch off main thread
Bug: 116481529