Revert "Revert "Keyboard light: Fix the physical keyboard not light when it's visiable.""

This reverts commit a3ea3ace3fbc6215a55528ed97a91c38d721cedd.
Revert "Allow setting a per-device default configuration for STATUS_BAR_BATTERY"

This reverts commit e285f8e862349b86b488a440bef112a1884a19b1.
Revert "implement noise suppression for phone calls (1/2)"

This reverts commit e230b63a27d6e8ee12f883d89179c65fe3dbf588.