Implement BT settings functionality for new UI.

- Removed context menu logic for long press (no longer used).
- Converted device picker to run in its own Activity, using a dialog
  theme on large screen devices and full-screen on phones.
- Removed unused resources.
- Add device to "Paired devices" list when pairing is initiated by the
  remote device.
- Return to Bluetooth settings pane after successfully pairing a new
  device from the "Find nearby device" pane.
- Add support for renaming devices (TODO: persist the custom name and
  update the "bread crumb" in the action bar to the new device name).
- Add support for incoming file transfer and auto connect checkboxes
  in DeviceProfilesSettings.
- Show available and connected device profiles as icons instead of
  summary text. Available but disconnected profiles are drawn in gray.
- Fixed bluetooth_notif_message to include the device name as a parameter
  instead of appending the name to the end of the localized string.
- Changed some fields from private to package scope for more efficient
  access from inner classes.

Bug: 3137982

Change-Id: Ic2d6ee5be60c9c5b3f3a8a58846d58efedfa5c93

src/com/android/settings/bluetooth/LocalBluetoothManager.java

@@ -84,6 +84,8 @@ public class LocalBluetoothManager {
 
     private long mLastScan;
 
+    private LocalBluetoothManager() { }
+
     public static LocalBluetoothManager getInstance(Context context) {
         synchronized (LocalBluetoothManager.class) {
             if (sInstance == null) {
@@ -316,6 +318,7 @@ public class LocalBluetoothManager {
         void onScanningStateChanged(boolean started);
         void onDeviceAdded(CachedBluetoothDevice cachedDevice);
         void onDeviceDeleted(CachedBluetoothDevice cachedDevice);
+        void onDeviceBondStateChanged(CachedBluetoothDevice cachedDevice, int bondState);
     }
 
     public boolean shouldShowDialogInForeground(String deviceAddress) {