Adding BluetoothTestBase::CheckNotifySessionValue() method

device/bluetooth/test/bluetooth_test.h

Index: device/bluetooth/test/bluetooth_test.h
diff --git a/device/bluetooth/test/bluetooth_test.h b/device/bluetooth/test/bluetooth_test.h
index 52b6224174cf9a314d7a3983ab59dd6ff4fec8b2..11b3e13918cfbc2bb2e5e50fbe5498b56f4c36b1 100644
--- a/device/bluetooth/test/bluetooth_test.h
+++ b/device/bluetooth/test/bluetooth_test.h
@@ -401,6 +401,12 @@ class BluetoothTestBase : public testing::Test {
   virtual void SimulateGattDescriptorWriteWillFailSynchronouslyOnce(
       BluetoothRemoteGattDescriptor* descriptor) {}
 
+  // Tests if the notify session has been changed. The default implementation
+  // uses descriptors.
+  virtual void CheckNotifySessionValue(
+      uint16_t expected_config_descriptor_value,
+      int attempts);
+
   // Returns a list of local GATT services registered with the adapter.
   virtual std::vector<BluetoothLocalGattService*> RegisteredGattServices();