Add signal-composer speed and steering wheel event support

Add signal-composer speed and steering wheel event support

Changes include:
- Pull in signal-composer support from libqtappfw
- Add a configuration file that controls whether the existing
  canned animation behavior should be used, or events from
  signal-composer should drive speeds and indicators.
- Add new icons provided by LF graphics team for cruise control
  and lane departure warning, and drive their state based on
  appropriate steering wheel events.
- Hide/show the digital vehicle/engine speed values in the
  gauges based on the steering wheel info event. This is
  intended to work in sync with changes to tbtnavi to have it
  display larger speed indicators via an alternate page.

Bug-AGL: SPEC-3045, SPEC-3049

Change-Id: I77249f65b80596fe7f2af9fe29b3ed86b63a8a45
Signed-off-by: Scott Murray <scott.murray@konsulko.com>