[2/2] OmniGears: Changelog

This commit adds an entry in settings to display all changes that
were merged after current build time.

Settings: https://gerrit.omnirom.org/#/c/5783/

Change-Id: I05f099ef8c1e1ed2c93ab5b86da004d029d59edd

Conflicts:
	res/values-de/custom_strings.xml
	res/values/custom_strings.xml