Bluetooth: Add a "connectable" property to the BluetoothDevice.

device/bluetooth/bluetooth_device.h

Index: device/bluetooth/bluetooth_device.h
diff --git a/device/bluetooth/bluetooth_device.h b/device/bluetooth/bluetooth_device.h
index 319b54990a6e686f266d3260f65e8b532b23d08e..e38519145f87547067560f98d46336d8e1e805d0 100644
--- a/device/bluetooth/bluetooth_device.h
+++ b/device/bluetooth/bluetooth_device.h
@@ -178,6 +178,10 @@ class BluetoothDevice {
   // and at least one service available for use.
   virtual bool IsConnected() const;
 
+  // Indicates whether the bonded device accepts connections initiated from the
+  // adapter. This value is undefined for unbonded devices.
+  virtual bool IsConnectable() const;
+
   // Returns the services (as UUID strings) that this device provides.
   typedef std::vector<std::string> ServiceList;
   virtual const ServiceList& GetServices() const = 0;
@@ -329,6 +333,10 @@ class BluetoothDevice {
   bool bonded_;
   bool connected_;
 
+  // Indicates whether the device normally accepts connections initiated from
+  // the adapter once paired.
+  bool connectable_;
+
  private:
   // Returns a localized string containing the device's bluetooth address and
   // a device type for display when |name_| is empty.