s4-common: move ril class and flag to devices.

Change-Id: I163ade0e05b3c3cb34f355978bfd041df3f5c61f
s4-common: remove unused overlay options

Change-Id: I618d374a4fb9417637b90b4e25a292adbec11748

Conflicts:
	overlay/frameworks/base/core/res/res/values/config.xml