Camera: add aspectToleranceMultiplier

 * some devices need to adjust this aspect tolerance
   to correct some camera glitches. This adds a multiplier
   for the maintainer to adjust accordingly per device.
 * mulitplier is set to 1 for all devices unless changed in
   a device tree overlay.

Change-Id: If10803b41a7596817f294bd1a14a48e2eaaaceb1