Add onboarding avatar screen.

Includes a PhotoPickerPresenter to pick photos without requesting permissions.

RiotSwiftUI/Modules/Common/Avatar/View/AvatarImage.swift

@@ -35,22 +35,15 @@ struct AvatarImage: View {
             case .empty:
                 ProgressView()
             case .placeholder(let firstCharacter, let colorIndex):
-                Text(firstCharacter)
-                    .padding(4)
-                    .frame(width: CGFloat(size.rawValue), height: CGFloat(size.rawValue))
-                    .foregroundColor(.white)
-                    .background(theme.colors.namesAndAvatars[colorIndex])
-                    .clipShape(Circle())
-                    // Make the text resizable (i.e. Make it large and then allow it to scale down)
-                    .font(.system(size: 200))
-                    .minimumScaleFactor(0.001)
+                PlaceholderAvatarImage(firstCharacter: firstCharacter,
+                                       colorIndex: colorIndex)
             case .avatar(let image):
                 Image(uiImage: image)
                     .resizable()
-                    .frame(width: CGFloat(size.rawValue), height: CGFloat(size.rawValue))
-                    .clipShape(Circle())
             }
         }
+        .frame(width: CGFloat(size.rawValue), height: CGFloat(size.rawValue))
+        .clipShape(Circle())
         .onAppear {
             viewModel.inject(dependencies: dependencies)
             viewModel.loadAvatar(

RiotSwiftUI/Modules/Common/Avatar/View/PlaceholderAvatarImage.swift

@@ -0,0 +1,55 @@
+// 
+// Copyright 2022 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 SwiftUI
+
+@available(iOS 14.0, *)
+struct PlaceholderAvatarImage: View {
+    
+    // MARK: - Private
+    
+    @Environment(\.theme) private var theme
+    
+    // MARK: - Public
+    
+    let firstCharacter: String
+    let colorIndex: Int
+    
+    // MARK: - Views
+    
+    var body: some View {
+        ZStack {
+            theme.colors.namesAndAvatars[colorIndex]
+            
+            Text(firstCharacter)
+                .padding(4)
+                .foregroundColor(.white)
+                // Make the text resizable (i.e. Make it large and then allow it to scale down)
+                .font(.system(size: 200))
+                .minimumScaleFactor(0.001)
+        }
+        .aspectRatio(1, contentMode: .fill)
+    }
+}
+
+@available(iOS 14.0, *)
+struct Previews_TemplateAvatarImage_Previews: PreviewProvider {
+    static var previews: some View {
+        PlaceholderAvatarImage(firstCharacter: "X", colorIndex: 1)
+            .clipShape(Circle())
+            .frame(width: 150, height: 100)
+    }
+}