Move SELinux to common

@Paul-L

Conflicts:
	BoardCommonConfig.mk
	common.mk

Change-Id: I9c15579bd7f3f779bed8aafa273c2f3899ee9d32
Disable stock OTA components if installed
And also add Legacy Google provider, for better localization

Change-Id: Id6a6030950f50d40e29ee7f8847c83fa394607db