Various issues

[JimmyWuUNC]

Things that should to be done:

1. Fix spelling mistake in Android code: "DOMINATE_WRIST"
2. Activities: change running to jogging, remove stretching, add staying still.
3. Watch and Android: Inform users that they need to completely exit the app to stop logging.

[JimmyWuUNC]

Fixed (1) and (2).