Hardware: add SerialNumber support

Some manufacturers, e.g. Samsung and Acer, display a different
serial number in Settings -> About Phone than the one in
ro.serialno. This class enables the alternative serial number,
which is the one marked physically on the device, to be displayed.

Change-Id: If328ca7b487435b88246d1f8c47b04770183f09e
Add tap-to-wake class definition

Change-Id: Icaa7f8e8846ab4d7375a03b407fb3c80a194de49
Hardware: add ColorEnhancement support

Change-Id: I32e52c0e11dff2ce9d30d17e028190637ad2b1ff
HAF: Add KeyDisabler stub

Allow disabling the capacitive keys on a device

Change-Id: I855cb094963bc3263fd68e4dacbbd8f331ccb825
Add default value for display color control (1/2)

Change-Id: Ib7f1256722b8ccc1259d6b47f840ea718a14070b