App: Improve device identification and filename clarity for recorded data

[DennisMoschina]

Feedback for Discussion:

• It is difficult to determine Left (L) from Right (R) device based on the default names—in both the on-screen display and in the recorded data files.
• Additionally, there appears to be no way to adjust the default filenames of output recorded data, which makes it challenging to distinguish data from the Bone Conduction accelerometer and from the IMU accelerometer.

Suggestions for improvement:

• Improve the default naming on screen and in data files to make L/R device clear.
• Allow customization or more descriptive default filenames so device type (e.g., Bone Conduction vs. IMU) is evident for recorded data.