Revert "Add missing Halo activity"

This reverts commit 49d6cf7c0892812ab7870838f9e8ccf5e5850870.
Revert "Move Halo strings/arrays to CM strings/arrays"

This reverts commit fb924220c1c197186d820ad458f8cb29fff4f91f.

Conflicts:
	res/values/cm_arrays.xml
	res/values/cm_strings.xml
Revert "Settings: HALO"

This reverts commit bbf5c0448f969b1974d79b92daa8a12786544984.

Conflicts:
	res/xml/settings_headers.xml
Remove Halo old code