Merge "Update API docs for "is_ims_conference_size_enforced_bool" key." am: be88f1fa54 am: 5a6034c220

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1853625

Change-Id: I40114a88ce16e6e2833cbf738d3d8b29b49069da