Revert "Settings: Remove System updates"

We're going to make use of this :)

This reverts commit 0cb067c101ba66fb0fc1408b906642f6ca4c96c9.

Change-Id: I29da9c36412c200383fb10bf2697042bffe5f5ee
Merge "Revert "Settings: Remove System updates"" into android-4.4
[1/2] Settings: interface settings restructering

Change-Id: I3de1cc9367deaa31baf6c2e86b8da7084ef788d1
Merge "[1/2] Settings: interface settings restructering" into android-4.4
merge changes from Omni 4.4 into local branch

Conflicts:
	res/xml/settings_headers.xml

Change-Id: I8eaef0f2484c0b07b095d41224917e65ba28d64b