sde: Add support to set the display mode of the primary display

The display mode for the primary display can be set to either
command or video mode if the target supports this.

Syntax:
  adb shell "service call display.qservice 29 i32 <DISPLAY_MODE>"

  DISPLAY_MODE = 1 -> Video
                 2 -> Command

Change-Id: Iadf4beea8959a90a0b18f8286a094bbbdf18358a
22 files changed