Merge "Use ILights.DESCRIPTOR to refer to AIDL HAL" am: 26b017aae2 am: 2901676439 am: 8cb52df72a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1426850

Change-Id: Icb01023451a93ab4924b2d4ff0158d2e1517f6d0