Store accelerometer readings in a buffer

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Import the following classes:
- net.rim.device.api.system.AccelerometerChannelConfig;
- net.rim.device.api.system.AccelerometerSensor.Channel;

Create a configuration for a channel to the accelerometer.

AccelerometerChannelConfig channelConfig = new AccelerometerChannelConfig( AccelerometerChannelConfig.TYPE_RAW );

Invoke AccelerometerChannelConfig.setSamplesCount(), to specify the number of acceleration readings to store in the buffer. Each element in the buffer contains acceleration readings for the x, y, and z axes and data on when the reading took place.
```
channelConfig.setSamplesCount( 500 );
```

Invoke AccelerometerSensor.openChannel() to open a channel to the accelerometer.

Channel bufferedChannel = AccelerometerSensor.openChannel( Application.getApplication(), channelConfig );

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