Changing notification icon to mdi:run-fast

I’m setting up motion notifications for my families mobile devices so that when motion is received, there is a notification sent to the phones. Is it possible to change the icon that is coming up on our phones? Looks like it is, but I cannot get my codeset to work.

description: ""
triggers:
  - trigger: state
    entity_id:
      - binary_sensor.g4_doorbell_pro_poe_motion
    from: "off"
    to: "on"
conditions: []
actions:
  - device_id: <android phone id>
    domain: mobile_app
    type: notify
    message: Test
    data:
      icon: mdi:run-fast
mode: single

I dont have any objection to changing anything on here if this isnt the best way to go (I started with Lovelace/UI).