Support for A02YYUW ultrasonic sensor

[d0n13]

Feature request

Is your feature request related to a problem? Please describe.

Possible to support the A02 ultrasonic sensor?

https://wiki.dfrobot.com/_A02YYUW_Waterproof_Ultrasonic_Sensor_SKU_SEN0311

Describe the solution you'd like
Measure height over water for flying hydrofoil

Describe alternatives you've considered
The sensor which is supported is JSN-SR04T but it’s not using its serial mode and uses pulse timing so not easy to convert existing driver to use A02 but I’m open to possibility of helping to write new driver but don’t have enough experience of ArduPilot coding yet.

Platform
[ ] All
[ ] AntennaTracker
[ ] Copter
[*] Plane
[ ] Rover
[ ] Submarine

Additional context
Need to use a waterproof sensor instead of the JSN-SR04T