Merge "Have isRinging return true when simulated ringing" am: ce5d5035c1 am: ae013fecf0 am: 5bfc75f9c7

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telecomm/+/1340773

Change-Id: I1ed2236bb857b18ad56b80f64b36124ff309b1da