AVPlayer system controls on iOS

Backports/ToolbarBackground+Backport.swift

@@ -0,0 +1,21 @@
+import SwiftUI
+
+extension Backport where Content: View {
+    @ViewBuilder func toolbarBackground(_ color: Color) -> some View {
+        if #available(iOS 16, *) {
+            content
+                .toolbarBackground(color, for: .navigationBar)
+        } else {
+            content
+        }
+    }
+
+    @ViewBuilder func toolbarBackgroundVisibility(_ visible: Bool) -> some View {
+        if #available(iOS 16, *) {
+            content
+                .toolbarBackground(visible ? .visible : .hidden, for: .navigationBar)
+        } else {
+            content
+        }
+    }
+}