App.framework must support iOS 8 for older Flutter projects (#68729)

* App.framework must support iOS 8 for older Flutter projects

* Fix test

examples/flutter_view/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>8.0</string>
 </dict>
 </plist>

examples/hello_world/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>8.0</string>
 </dict>
 </plist>

examples/image_list/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>8.0</string>
 </dict>
 </plist>

examples/layers/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>8.0</string>
 </dict>
 </plist>

examples/platform_channel/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>8.0</string>
 </dict>
 </plist>

examples/platform_channel_swift/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>8.0</string>
 </dict>
 </plist>

examples/platform_view/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>8.0</string>
 </dict>
 </plist>

packages/flutter_tools/lib/src/base/build.dart

@@ -241,12 +241,9 @@ class AOTSnapshotter {
       '-arch', targetArch,
       if (isIOS)
         // When the minimum version is updated, remember to update
-        // template IPHONEOS_DEPLOYMENT_TARGET and MinimumOSVersion.
+        // template MinimumOSVersion.
         // https://github.com/flutter/flutter/pull/62902
-        // Also update the podhelper.rb "deployment version too low"
-        // warning suppression version.
-        // https://github.com/flutter/flutter/pull/66590
-        '-miphoneos-version-min=9.0',
+        '-miphoneos-version-min=8.0',
     ];
 
     const String embedBitcodeArg = '-fembed-bitcode';

packages/flutter_tools/templates/app/ios.tmpl/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>8.0</string>
 </dict>
 </plist>

packages/flutter_tools/templates/module/ios/library/Flutter.tmpl/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>8.0</string>
 </dict>
 </plist>

packages/flutter_tools/test/general.shard/base/build_test.dart

@@ -34,7 +34,7 @@ const FakeCommand kSdkPathCommand = FakeCommand(
 );
 
 const List<String> kDefaultClang = <String>[
-  '-miphoneos-version-min=9.0',
+  '-miphoneos-version-min=8.0',
   '-dynamiclib',
   '-Xlinker',
   '-rpath',
@@ -54,7 +54,7 @@ const List<String> kDefaultClang = <String>[
 ];
 
 const List<String> kBitcodeClang = <String>[
-  '-miphoneos-version-min=9.0',
+  '-miphoneos-version-min=8.0',
   '-dynamiclib',
   '-Xlinker',
   '-rpath',

packages/flutter_tools/test/general.shard/build_system/targets/common_test.dart

@@ -526,7 +526,7 @@ void main() {
         'clang',
         '-arch',
         'armv7',
-        '-miphoneos-version-min=9.0',
+        '-miphoneos-version-min=8.0',
         '-dynamiclib',
         '-Xlinker',
         '-rpath',
@@ -549,7 +549,7 @@ void main() {
         'clang',
         '-arch',
         'arm64',
-        '-miphoneos-version-min=9.0',
+        '-miphoneos-version-min=8.0',
         '-dynamiclib',
         '-Xlinker',
         '-rpath',
@@ -635,7 +635,7 @@ void main() {
         'clang',
         '-arch',
         'arm64',
-        '-miphoneos-version-min=9.0',
+        '-miphoneos-version-min=8.0',
         '-dynamiclib',
         '-Xlinker',
         '-rpath',
@@ -724,7 +724,7 @@ void main() {
         'clang',
         '-arch',
         'arm64',
-        '-miphoneos-version-min=9.0',
+        '-miphoneos-version-min=8.0',
         '-dynamiclib',
         '-Xlinker',
         '-rpath',