Merge "Update API docs for "is_ims_conference_size_enforced_bool" key." am: be88f1fa54 am: 5a6034c220 am: 7aeb5707f2

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

Change-Id: I10f401b979c64333a3d26e82fdb20f0051238caf