Adds new types to public API:
* ColorSpaceTransform
* Range<T>
* SizeF (android.util)
* MeteringRectangle
Minor changes to:
* Size (docs and move to android.util)
* Preconditions (@hide)
Adds helper class:
* HashCodeHelpers
Change-Id: Ied6749a19234f3af9da838f365f8d68d90251aaf