Introduce CallBar view management

Riot/Modules/Call/Views/CallBar/CallBar.swift

@@ -0,0 +1,52 @@
+// 
+// Copyright 2020 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+import Reusable
+
+@objc protocol CallBarDelegate: class {
+    func callBarDidTapReturnButton(_ callBar: CallBar)
+}
+
+@objcMembers
+class CallBar: UIView, NibLoadable {
+    
+    @IBOutlet private weak var callIcon: UIImageView! {
+        didSet {
+            callIcon.image = Asset.Images.voiceCallHangonIcon.image.vc_tintedImage(usingColor: .white)
+        }
+    }
+    @IBOutlet private weak var titleLabel: UILabel!
+    @IBOutlet private weak var returnButton: UIButton!
+    
+    weak var delegate: CallBarDelegate?
+    
+    static func instantiate() -> CallBar {
+        return CallBar.loadFromNib()
+    }
+    
+    var title: String? {
+        get {
+            return titleLabel.text
+        } set {
+            titleLabel.text = newValue
+        }
+    }
+    
+    @IBAction private func returnButtonTapped(_ sender: UIButton) {
+        delegate?.callBarDidTapReturnButton(self)
+    }
+}