init.sh: Don't enable button backlight on boot

* Not all devices have button backlight
* We want a consistent experience between all devices

Change-Id: I0b63a3b617df7d7622a3329fa257e25d62b36f73
init.sh: Don't enable blue led in recovery

* Preparing for recovery charging LED indicator

Change-Id: I96caaee3625d978b943a1aa9382571dca03988d2