DSDA: Skip over held call when adding 2nd call am: 9b50c675bb

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telephony/+/25361293

Change-Id: Ib349f2b5b39bc83a13bab5d08efcc6915e718bfc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>