[2/2] OmniGears: Double tap to sleep

Double tap statusbar to sleep.

https://gerrit.omnirom.org/#/c/4385

Change-Id: I533ff5ba52ec3f9268cdf1d98abb657dc8556d48

Conflicts:
	res/values/custom_strings.xml
	res/xml/bars_settings.xml
	src/org/omnirom/omnigears/interfacesettings/BarsSettings.java