Final (?!?!?!) phone_car refactoring. - Got rid of PHONE_car/device-common.mk - Simplified PHONE_car/device-PHONE-car.mk so it just include other makefiles - Moved computepipe.mk to common code Fixes: 160823761 Test: built and booted the affected devices Change-Id: I8557b3b81659f2ab24becf5c176f9d49d72dc581