Add Google Analytics support

PS2: add branch build prop
PS3: add device prop since in many cases the ro.product.device property differs
     from the AOKP codename

Change-Id: Ica9f4034bf8363fb89bc40d3beb134c5aa17803d
Signed-off-by: Gergely Szell (sethyx) <szell@hu.ibm.com>

Conflicts:
	prebuilt/Android.mk