Summary:
Creates a mapbuffer from two ViewProp objects. This MapBuffer is used later instead of bag of props from JS to set the properties with platform ViewManager.
Changelog: [Internal] - Added MapBuffer diffing for ViewProps
Reviewed By: mdvacca
Differential Revision: D33735246
fbshipit-source-id: 10ad46251ea71aa844586624c888f5223fa44e57