Telephony: Heads up meets SlimKat....SlimKat meets Google IO [3/5]

Add heads up setting for the native integration in dialer

Enabled by default

PS
- derp

PS
update commit message header

Change-Id: I21790aad6830eda891bb316d68f2c4314dd7e08d
Signed-off-by: Stefano Mura [STELIX PippoX3] <ssspinni@gmail.com>
Merge commit 'refs/changes/85/1485/2' of https://review.carbonrom.org/CarbonDev/android_packages_services_Telephony into kk