Core & SystemUI: RU translation

Fix ALL the translations!
Includes plurals' fix (cause I'm tired of wrong timestamps here and there)

Change-Id: If5ce60a421d3fcdf4836f5312b5205a6b11ba3f7

Conflicts:

	core/res/res/values-ru/cm_strings.xml
	core/res/res/values-ru/strings.xml
	packages/SystemUI/res/values-ru/cm_strings.xml