Merge "Move the downgraded conference property" am: f8ac8e9b02 am: 5e119ff2ba am: 8bdb56b695 am: 41f0ad4477

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1329327

Change-Id: I1f67f9529189eff1884e0421790b88a4595b2fcf