Revert "[2/4] Settings: TRDS 3.0 and new theme engine preparation for XPerience"

This reverts commit e14e8d3d7fd217bbc6c309a5a737277f0085ad8c.

Conflicts:
	res/values/xpe_strings.xml

Change-Id: I3ad01281fb0ead6fd61a5a8f91651a288ce1bb5b