Add RequestContactsAccessFooterView.

Update InviteFriendsHeaderView and StartChatViewController styles to match Figma doc.

Riot/Modules/StartChat/RequestContactsAccessFooterView.swift

@@ -0,0 +1,66 @@
+// 
+// Copyright 2021 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 UIKit
+import Reusable
+
+@objc protocol RequestContactsAccessFooterViewDelegate {
+    func didRequestContactsAccess()
+}
+
+@objcMembers
+class RequestContactsAccessFooterView: UIView, NibLoadable, Themable {
+    
+    weak var delegate: RequestContactsAccessFooterViewDelegate?
+    
+    @IBOutlet weak var containerView: UIView!
+    @IBOutlet weak var titleLabel: UILabel!
+    @IBOutlet weak var descriptionLabel: UILabel!
+    @IBOutlet weak var requestAccessButton: CustomRoundedButton!
+    @IBOutlet weak var footerLabel: UILabel!
+    
+    // MARK: - Setup
+    
+    static func instantiate() -> Self {
+        let view = Self.loadFromNib()
+        view.update(theme: ThemeService.shared().theme)
+        return view
+    }
+    
+    override func awakeFromNib() {
+        super.awakeFromNib()
+        
+        containerView.layer.cornerRadius = 8
+        requestAccessButton.layer.cornerRadius = 8
+    }
+    
+    func update(theme: Theme) {
+        tintColor = theme.tintColor
+        
+        containerView.backgroundColor = theme.textQuinaryColor
+        
+        titleLabel.textColor = theme.textPrimaryColor
+        descriptionLabel.textColor = theme.textSecondaryColor
+        footerLabel.textColor = theme.textTertiaryColor
+        
+        requestAccessButton.backgroundColor = theme.tintColor
+        requestAccessButton.setTitleColor(theme.backgroundColor, for: .normal)
+    }
+    
+    @IBAction private func requestContactsAccess(_ sender: Any) {
+        delegate?.didRequestContactsAccess()
+    }
+}