CTS Verifier: Don't throttle MIDI data

There was a breaking change with MTU sizes in Android 14.
By fixing this breaking change, it seems like the CTS Verifier
MIDI tests no longer need to throttle data for Bluetooth.

Bug: 308909343
Test: CTS Verifier Bluetooth MIDI tests
Change-Id: I84796f0c3e9be22ffc687750b4cb7af54472ddd1