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: If0c4b2e59144b1f199c44add399a3f528ac11e5b

Conflicts:
	core/java/android/app/ContextImpl.java
	services/java/com/android/server/SystemServer.java