@Override
                public void onAccuracyChanged(final Sensor sensor, final int accuracy) {
                    // empty
                }
On some Samsung devices, {@link SensorManager#getRotationMatrixFromVector} throws an exception if the rotation
vector has more than 4 elements.
<p/>
This will be detected and remembered after the first occurrence of the exception. Concurrent access
is not a problem as this variable can only go from {@code false} to {@code true} and being {@code false}
instead of {@code true} is innocuous and will be changed immediately when needed.

@see <a href="http://stackoverflow.com/a/22138449">this Stack Overflow answer</a>
main/src/main/java/cgeo/geocaching/sensors/RotationProvider.java