Change user display name and avatar (#1718)

* Fixes #1715, #1716 - Add new user profile editing screen

* Bump SDK, adopt new `client.removeAvatar()` method

* Address PR review comments

ElementX/Sources/Screens/Settings/UserDetailsEditScreen/UserDetailsEditScreenModels.swift

@@ -0,0 +1,70 @@
+//
+// 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 Foundation
+
+enum UserDetailsEditScreenViewModelAction {
+    case displayCameraPicker
+    case displayMediaPicker
+    case displayFilePicker
+}
+
+struct UserDetailsEditScreenViewState: BindableState {
+    let userID: String
+    
+    var currentAvatarURL: URL?
+    var selectedAvatarURL: URL?
+    
+    var currentDisplayName: String?
+    
+    var localMedia: MediaInfo?
+    
+    var bindings: UserDetailsEditScreenViewStateBindings
+    
+    var nameDidChange: Bool {
+        bindings.name != currentDisplayName
+    }
+    
+    /// The string shown for the room's name when it can't be edited.
+    var nameRowTitle: String {
+        bindings.name.isEmpty ? L10n.screenEditProfileDisplayName : bindings.name
+    }
+            
+    var avatarDidChange: Bool {
+        localMedia != nil || selectedAvatarURL != currentAvatarURL
+    }
+    
+    var canSave: Bool {
+        !bindings.name.isEmpty && (avatarDidChange || nameDidChange)
+    }
+    
+    var showDeleteImageAction: Bool {
+        localMedia != nil || selectedAvatarURL != nil
+    }
+}
+
+struct UserDetailsEditScreenViewStateBindings {
+    var name = ""
+    var showMediaSheet = false
+}
+
+enum UserDetailsEditScreenViewAction {
+    case save
+    case presentMediaSource
+    case displayCameraPicker
+    case displayMediaPicker
+    case removeImage
+}