Settings: Add CM Updater

Squashed commit of the following:

Author: DvTonder <david.vantonder@gmail.com>
Settings: Add Updater and Changelog
Change-Id: I8cf09962d9ba667bcdba78d7214fd6b5bb0feedc

Author: Jorge Ruesga <jorge@ruesga.com>
settings: hide settings of disabled components

Change-Id: I977bd0c9668b479773802f99d03ecd1072e12f75
JIRA: CYAN-3552
Issue: https://jira.cyanogenmod.org/browse/CYAN-3552
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>

Author: Michael Bestas <mikeioannina@gmail.com>
Move CM updater & remove summary

* Move CM Updater to the top, like the fota app
* Use android's default 'System updates' empty summary
Change-Id: Ia3358397be97bc0ac19dd73598d053eb29efe31d

Change-Id: I8cf09962d9ba667bcdba78d7214fd6b5bb0feedc (reverted from commit 4b32ace978c47377a5e824b99fbd27e6882365ef)