sde: Add Scalar class to handle the featurization

1. Handle featurization in Scalar class by creating appropriate scalar
   object based on the feature flag or availability of Scalar library.
2. Define ScaleData structure in SDE. Each HWPipeInfo has a ScaleData
   member. Resource Manager uses scalar object to configure ScaleData.
3. HWDevice translates ScaleData structure to MDP scale data for each
   pipe.

Change-Id: I1ba40281aabadae7da35353c4410538337d3c700
7 files changed