Make the kernel image format parametric instead of a chain of if/elses

Change-Id: I54bfcdecb8647f7bcf744e72b2de19fcf4e4e7ac
Remove HomeSample from builds

As good as it looks, we already have a launcher (Launcher3)

Change-Id: I87cac70eec30fd62d6f7ecb7777caa9d240fe0ee
remove quicksearchbox

outdated...tons of aapt warnings and no one is using it

so we remove it from all possible build types

Change-Id: I9d5b0fb1af2fb695b5e4d34a537fb8e10eeb2511
cm: Fix global selinux policy inclusion

We're adding slim-specific policies to an overlay instead of patching
external/sepolicy, so we need to make sure it's included to prevent
misbehaving systems

Change-Id: I7989a1093f9abc8360d492e73a860eb4afad10ad