lights: Adding keypad alt/shift LED light IDs

in conjunction with the alt/shift light patch for
frameworks/base:
http://review.cyanogenmod.org/#/c/34903/

Change-Id: Ie97a80d398d474950340cba60c48ba5904978ec5
Add support for STE-Ericsson hardware video accelleration 1/3

Credits: @percy-g2