TF700T: Remove metadata function keys from asusdec

This patch contains:

* Removed all metadata related (function keys) from asusdec
* Removed all unused code from Autoparts
* Key events notifications are handled again by Autoparts
* Readded Autoparts to the tf700t build

Change-Id: I272d6d71cff4cbc0af96950e8fa92c01276ab995
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Merge "TF700T: Remove metadata function keys from asusdec" into cm-10.2