Added 0x520D RM4C mini device

[titusthefox04]

Context

Proposed change

I added new device RM4C mini buyed on Aliexpress with id 0x520D. The firmware version is v52079 It support WIFI and bluetooth both

I tested the new device editing the python-broadlink library, in my home assistant instante. After the file edit I added the device to the home assistant official integration. After I used smartIR to send command my Mitsubishi HVAC.

Type of change

• [ ] Dependency upgrade
• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New device
• [x] New product id (the device is already supported with a different id)
• [ ] New feature (which adds functionality to an existing device)
• [ ] Breaking change (fix/feature causing existing functionality to break)
• [ ] Code quality improvements to existing code or addition of tests
• [ ] Documentation

Additional information

• This PR fixes issue: fixes #
• This PR is related to:
• Link to documentation pull request:

Checklist

• [x] The code change is tested and works locally.
• [ ] The code has been formatted using Black.
• [ ] The code follows the Zen of Python.
• [x] I am creating the Pull Request against the correct branch.
• [ ] Documentation added/updated.