Lockscreen : Customizable shortcuts

Allow users to choose lockscreen shortcuts / icons :
	Phone - 1-5 targets
	Tablets - 1-8 targets

Patchset 2  : Fix default target reading
Patchset 3  : Switch to resolveActivityInfo
Patchset 4  : Case check for empty target
Patchset 5  : Add index check for targetDescriptions
            : Minor cleanup
Patchset 6  : Custom icons
            : The RSS, Browser, Facebook, Twitter and Podcasts images are
              derivative works by DvTonder made from the from the WPZOOM Developer Icon Pack,
              licensed under Creative Commons Attribution-NonCommercial-ShareAlike, (c) WPZOOM
Patchset 7  : Fix variable reference
Patchset 8  : Change storing method (dynamically get drawable id)
Patchset 9  : Randomz...
Patchset 10 : Icon pack support (Template found at : https://github.com/Danesh/CmIconPicker)
            : Removed stock messaging icon, use ours instead.
Patchset 11 : Code cleanup

Change-Id: I93c842a78fff3517002f7be08555db5b585f6eb8