Address the 'ART' Issue

Rather than outright remove this completely, address primary concerns:

* Add a more verbose warning message on alert dialog
* Explicitly state experimental form
* Explicitly state not supported (no bug reports)
* Explicitly state issues (crashes, bootloop, etc)

See prior discussion: http://review.cyanogenmod.org/#/c/55609/

PS2: Linkify

Change-Id: Icf103b5576c8e93f8a30ccd348476bf207401355
Only show ART information if switching from dalvik to ART

We do not want to confuse users with a big information dialog, if
they change from ART to dalvik as dalvik is still the official
solution, supported and considered safe.

Change-Id: I0ce4846e0bb751e87e5c410e668d4bc521380141
Merge "Address the 'ART' Issue" into kitkat
Merge "Only show ART information if switching from dalvik to ART" into kitkat
Merge branch 'pa_upstream/kitkat'
[2/2] Settings: PA Version Easter Egg

    Launch Google's dessert tray easter egg by tapping on the
    ParanoidAndroid Version found in about phone.
    Modified transitions taken from the current Google implementation.

Change-Id: I340efbb663ae28ff58759b0530880edce7c545d3
Merge branch 'kitkat' of https://github.com/AOSPA/android_packages_apps_Settings into kitkat
merge from pa