Merge "Prevent null pointer exception in getCurrentCall method" into tm-qpr-dev am: 5fcf3f55

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/21078309



Change-Id: I6cf71e2c3d6683c9b892b68494e58964ed44dab4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>