Settings: Disable search item in some fragments.

Change-Id: I17ed6945f34f2fe7bb18674124f8a8989145b8c1
Settings: For the sake of search, don't split security settings.

    - There's also no good reason for having separate xml's for these.

Change-Id: I0216a2be10b801769eef7783f6c52a2b18b06aef
DisplayColor: Properly handle a minValue

* Previously setting anything as a minValue would cause the
  percentages to get out of whack. For instance, setting it to 35
  would cause the maximum percentage to climb above 100% as well
  as still allowing the value to be set lower than the min.
* This makes the maximum for the slider the max value minus the min
  (so we get the proper spread for min to max) and then adds the min
  back on before setting so we can't possibly go below the min.

Change-Id: I8dcdc422f54847940351fae10c74af6301d1e1be