Revert "status bar: native battery percentage"

This reverts commit c123a0c0c5a2cf8f2de0e8903d7fa2c114c54b8b.
status bar: battery level text

1. Add TextView to display battery level percentage next to the battery icon.
2. Remove support for displaying battery percentage on the actual battery icon itself.
3. Also respect view on lockscreen and opened notification drawer.