Merge "fix toggling hold for a single transactional call" into udc-dev am: 8ca7f713

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/22516236



Change-Id: I06b0e3120c04860564a2cdd148b0616ac15529b6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>