add errno.h to fix compile errors on other devices

Change-Id: I84196fb1358264b216b8505b990ae5a0406aa957
Don't interpret ABS_MT_TOUCH_MAJOR == 0 as touch release

On n8013 at least, this event is sometimes/often sent on touch start which
causes touches to be randomly rejected and throws you back to the start screen.

Touch releases still work fine for me, since it sends ABS_MT_TRACKING_ID == -1
for that purpose.

Adds a flag TW_IGNORE_MAJOR_AXIS_0 to configure this behavior.

Change-Id: I14bb036a2c2d4ee676b642c3ab297c55bb6c2084
Fix white point on top-bar images in some themes

Change-Id: Ic6a0b4b3e41818ff510ca652d5f14bdecd531826
Initial 240x240 theme

Change-Id: I478f172e1a549b50ebe29cf9a8b8618a84b3cb17
Set listener properties for UMS mount/unmount

Some kernels require the usb functions be defined before UMS mounting
of storage partitions will work. This sets the sys.storage.ums_enabled
property upon mount/unmount which can be listened for in init.rc.

Example routines to include in init.rc:

on property:sys.storage.ums_enabled=1
    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/functions adb,mass_storage
    write /sys/class/android_usb/android0/enable 1

on property:sys.storage.ums_enabled=0
    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/functions adb
    write /sys/class/android_usb/android0/enable ${service.adb.root}

Change-Id: I8a8ad4b392abbaa173d402714bcb4049ba84ccca
Force GUI render after setting brightness

Change-Id: I4470a3a090d10f400575d45338a8349fbee8a027
minui: Allow devices to blank/unblank using LCD backlight

* Some devices rely on the LCD backlight to blank/unblank the display,
  support them by allowing a custom LCD backlight path to be used.

Change-Id: I8406b4b55cd7a2afc4f8f8ba65de2c53b949489d
minui: adapt backlight blanking commit to TWRP

Change-Id: I79417d218c84fcdaf2ce5ecdf314031831d89575