[2/3] settings: add support for adb over network

PS6:
rebased to solve merge conflict

PS7:
now its correct

Change-Id: Ibc577c36e4f3dec348da11ae5603e6406db6571c
Settings: notification lights - fix for devices without leds

On devices that don't have notification leds, the preference
should be hidden in display settings. I adapted the commented
code for the new PreferenceScreen and removed unneeded commented
parts. Now the value of config_intrusiveNotificationLed is checked
and the preference is displayed accordingly.

Change-Id: Ia7834d1f415928d566b1ab8bc93c361c738487f2
Merge "[2/3] settings: add support for adb over network" into android-4.3
Merge "Settings: notification lights - fix for devices without leds" into android-4.3
Merge pull request #2 from omnirom/android-4.3

[2/3] settings: add support for adb over network