Use proper gatt_notify_conn_update::status type at corresponding level am:...

Use proper gatt_notify_conn_update::status type at corresponding level am: 97302282 am: 560b2905

Original change: https://android-review.googlesource.com/c/platform/system/bt/+/1477052

Change-Id: Ida7138b754544c0a940a5b36061807474dcc06db