Associate the room address field helper text and error with the field

The address field already had an accessibility label, but the section's
helper text and validation error were only shown in a separate footer and
weren't conveyed to VoiceOver when focusing the field. Compose them into the
field's accessibility hint.

Addresses #5258.

ElementX/Sources/Screens/EditRoomAddressScreen/View/EditRoomAddressScreen.swift

@@ -16,7 +16,9 @@ struct EditRoomAddressScreen: View {
         Form {
             Section {
                 EditRoomAddressListRow(aliasLocalPart: $context.desiredAliasLocalPart,
-                                       serverName: context.viewState.serverName, shouldDisplayError: context.viewState.aliasErrors.errorDescription != nil)
+                                       serverName: context.viewState.serverName,
+                                       errorDescription: context.viewState.aliasErrors.errorDescription,
+                                       footerText: L10n.screenEditRoomAddressRoomAddressSectionFooter)
                     .onChange(of: context.desiredAliasLocalPart) { _, newAliasLocalPart in
                         context.desiredAliasLocalPart = newAliasLocalPart.lowercased()
                     }