Record from Bluehooth / Headset / Headphones?

# Bug Report

## Problem

When using this plugin with a device connected to a bluetooth headset, the play() method outputs to the headset (as expected), not the device's speaker, but the .startRecord()/.stopRecord sequence does not capture sounds being played through the headsets. (the use case: to capture a snippet of sound being played back).

Is this expected? I don't know if this is a bug or a feature :) but there appears to be no configuration option to record from the bluetooth channel.

### What is expected to happen?

The recording should capture the sound (and input if it exists) from the Bluetooth headset.

### What does actually happen?

The recording only captures sound from the device's speaker.

## Information

### Command or Code

### Environment, Platform, Device

### Version information

## Checklist

- [ x] I searched for existing GitHub issues
- [ ] I updated all Cordova tooling to most recent version
- [ ] I included all the necessary information above

Start with the plugin's play(), .startRecord(), and .stopRecord() entry points and reproduce the sequence with a Bluetooth headset connected. Check how recording and playback routes are selected on the affected device; done means the Bluetooth capture behavior is established and the issue is resolved or its supported limitations are documented.

Written by the indexing model from the issue text.