Add bluetooth visible item

Show "Visible as [Device name]". Also remove the menuitem for
changing device name.

This cl creates a preference controller to handle the logic for
device name preference.

Bug: 35876447
Test: RunSettingsRoboTests

Change-Id: I9ab6c9d2df5b053d15b8ff887073ef82616243a4

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

@@ -58,7 +58,7 @@ public final class BluetoothNameDialogFragment extends InstrumentedDialogFragmen
 
     // accessed from inner class (not private to avoid thunks)
     static final String TAG = "BluetoothNameDialogFragment";
-    final LocalBluetoothAdapter mLocalAdapter;
+    LocalBluetoothAdapter mLocalAdapter;
     EditText mDeviceNameView;
 
     // This flag is set when the name is updated by code, to distinguish from user changes
@@ -85,16 +85,19 @@ public final class BluetoothNameDialogFragment extends InstrumentedDialogFragmen
         }
     };
 
-    public BluetoothNameDialogFragment() {
-        LocalBluetoothManager localManager = Utils.getLocalBtManager(getActivity());
-        mLocalAdapter = localManager.getBluetoothAdapter();
-    }
-
     @Override
     public int getMetricsCategory() {
         return MetricsProto.MetricsEvent.DIALOG_BLUETOOTH_RENAME;
     }
 
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        LocalBluetoothManager localManager = Utils.getLocalBtManager(getActivity());
+        mLocalAdapter = localManager.getBluetoothAdapter();
+    }
+
     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) {
         String deviceName = mLocalAdapter.getName();