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/BluetoothEnabler.java

@@ -32,7 +32,7 @@ import android.widget.Toast;
 
 /**
  * BluetoothEnabler is a helper to manage the Bluetooth on/off checkbox
- * preference. It is turns on/off Bluetooth and ensures the summary of the
+ * preference. It turns on/off Bluetooth and ensures the summary of the
  * preference reflects the current state.
  */
 public class BluetoothEnabler implements Preference.OnPreferenceChangeListener {
@@ -103,7 +103,7 @@ public class BluetoothEnabler implements Preference.OnPreferenceChangeListener {
         return false;
     }
 
-    private void handleStateChanged(int state) {
+    /* package */ void handleStateChanged(int state) {
         switch (state) {
             case BluetoothAdapter.STATE_TURNING_ON:
                 mCheckBox.setSummary(R.string.wifi_starting);