Merge "gatt_api: Do not attempt to connect to an empty address." into main am: 147ddaf0

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3254901



Change-Id: I8f251a6441553a836bf782c852468b70fde7b3c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>