otter-common: Use CM default wallpaper

Change-Id: I81cbe49c1c48bae4ec62088eaa79c8ddb4fa5154
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0

Conflicts:
	overlay/aosp/frameworks/base/core/res/res/drawable-sw600dp-nodpi/default_wallpaper.jpg