Fix multiple BT settings bugs.

- Change Bluetooth profiles screen to match ICS wireframes
- Remove BluetoothProfilePreference.java (no longer used)
- Remove "Pair with this device" summary below every unpaired device
- Remove "Paired but not connected" summary below unconnected paired devices
- Fix auto connection after pairing (reuse existing CachedBluetoothDevice)
- Add "Connected (no phone/media)" summaries based on ICS wireframes
- Fix visibility timeout strings.
- Fix crash when starting Bluetooth from Settings shortcut widget.

Bug: 5064139
Bug: 5064324
Bug: 5080404
Bug: 5093513
Bug: 5104485
Change-Id: Ie87103e183ce414c86cb1831a38ef0178b1b1292