Merge "Add default constructor to NR cell classes" am: f12f3415d0 am: 503b23ed03 am: 8ef5d0eb2c

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1202369

Change-Id: I98d0a95c48f8fde725490d44403c0720c147f59d