Split make room for outgoing call into a separate method for emergency am:...

Split make room for outgoing call into a separate method for emergency am: 0dbcaca6 am: e268ebb3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/11664061

Change-Id: I19c7a0878fcfce666015133a374681408310ef23