Merge "Add device-specific illumination transition time" into sc-dev am:...

Merge "Add device-specific illumination transition time" into sc-dev am: ea80426e am: cbe7b538 am: bc75a831

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15023573

Change-Id: I0acaf4a7ed80b36902776ab041a414cabedaac02