Settings: Improve touch sensivity string

Change-Id: I47cfb414af91657ed158b4010ffa0bbf21c0e8e9
Display: Default SRE to off

Facemelt mode is catching people by surprise and being interpreted
as "messed up colors". Default it to off so people can at least see
it kick in as a reaction to enablement

Change-Id: I5816e528363f508fc360c321c702a59f0bb79846