Update the Metal backend selection to use iOS 10.0 and A7 as the version floor. (#17162)

Fixes https://github.com/flutter/flutter/issues/52356

shell/platform/darwin/ios/rendering_api_selection.mm

@@ -7,6 +7,9 @@
 #include <Foundation/Foundation.h>
 #include <QuartzCore/CAEAGLLayer.h>
 #include <QuartzCore/CAMetalLayer.h>
+#if FLUTTER_SHELL_ENABLE_METAL
+#include <Metal/Metal.h>
+#endif  // FLUTTER_SHELL_ENABLE_METAL
 
 #include "flutter/fml/logging.h"
 
@@ -16,6 +19,7 @@ bool ShouldUseSoftwareRenderer() {
   return [[[NSProcessInfo processInfo] arguments] containsObject:@"--force-software"];
 }
 
+#if FLUTTER_SHELL_ENABLE_METAL
 bool ShouldUseMetalRenderer() {
   // If there is a command line argument that says Metal should not be used, that takes precedence
   // over everything else. This allows disabling Metal on a per run basis to check for regressions
@@ -31,11 +35,13 @@ bool ShouldUseMetalRenderer() {
     return true;
   }
 
-  // This is just a version we picked that is easy to support and has all necessary Metal features.
+  // Flutter supports Metal on all devices with Apple A7 SoC or above that have been update to or
+  // past iOS 10.0. The processor was selected as it is the first version at which Metal was
+  // supported. The iOS version floor was selected due to the availability of features used by Skia.
   bool ios_version_supports_metal = false;
-  // TODO(52356): Update this to be the version selected for release.
-  if (@available(iOS 11.0, *)) {
-    ios_version_supports_metal = true;
+  if (@available(iOS 10.0, *)) {
+    auto device = MTLCreateSystemDefaultDevice();
+    ios_version_supports_metal = [device supportsFeatureSet:MTLFeatureSet_iOS_GPUFamily1_v3];
   }
 
   // The application must opt-in by default to use Metal without command line flags.
@@ -44,6 +50,7 @@ bool ShouldUseMetalRenderer() {
 
   return ios_version_supports_metal && application_opts_into_metal;
 }
+#endif  // FLUTTER_SHELL_ENABLE_METAL
 
 IOSRenderingAPI GetRenderingAPIForProcess() {
 #if TARGET_IPHONE_SIMULATOR