Bluetooth 20240604-beta (2024-07-15) if left blank connects to anything

[bobparks]

Describe the bug

if the ConnectMatchingName parameter is left blank, the method connects to any old available device in the vicinity. Not sure if this is a problem; we can always ask students to use a conditional to test for blank. (To see if this was really happening, I tried killing the app, reinstalling the app, resetting the phone.)

Affects

Connecting to Bluetooth

• Designer
• Blocks editor
• [ x] Companion
• Compiled apps
• Buildserver
• Debugging
• Other... (please describe)

Expected behavior

Should throw an error if left blank.

Steps to reproduce

Connect to a Microbit with this example AIA.

@ewpatton