Merge "btif_hf: Fix NULL phone number" into tm-dev am: 3dc07108

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/18287391



Change-Id: I967842233f5c390cd6f2abce88a0a4ce827a1ab3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>