OmniGears: add generic color picker preference

Also fixes existing color pickers rotation handling

Change-Id: I7f3280517aeed9bc70edfbcd69a08e567a6a7366
OmniGears: add NumberPickerPreference

Change-Id: I53a28a3680c5fc19a1fdb2055945278e64a70cff
Merge branch 'android-4.4' of git://github.com/omnirom/android_packages_apps_OmniGears into jey

Conflicts:
	res/layout/dialog_color_picker.xml
	res/values/custom_dimens.xml
	res/values/custom_strings.xml