Merge "Call streaming implementation cleanups." into udc-dev am: c7cae571

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/22912703



Change-Id: Idf3762d613f5b4406a74256b0e0dfe2f157fd9c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>