Add battery options, clock options (Day, AM/PM, right, center, hide), battery text and battery bar options
Add LTE overlays for signal strength indicators.

Note that operators that wish to show "4G" instead of "LTE"
on these networks can set config_show4GForLTE to true.

Bug: 9265513
Bug: 9265217
Change-Id: If7f3580da7266b0d0c62639e30684393d4e03392