Delayed IMS tear down when voice call is ongoing am: 1d3dee7f

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/2091789



Change-Id: I9495e0df303b278268c13cedd81959d6f907751d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>