Irda: Add Irda System Service

This is not a perfect solution yet, but it does work and should therefore be a starting point.
It needs work to be functional on devices other than the Galaxy S4

* The Irda service is not started by default. It can be enabled via overlay.
* Uses a HAL module to communicate with sysfs

Change-Id: I911c5c76b0def43f7bca3bbc87cfd2958a6220e7

Conflicts:
	core/java/android/app/ContextImpl.java
	core/res/res/values/symbols.xml