Optionally include CocoaPods xcconfig (#73112)

dev/benchmarks/macrobenchmarks/ios/Flutter/Debug.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

dev/benchmarks/macrobenchmarks/ios/Flutter/Release.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

dev/benchmarks/macrobenchmarks/macos/Flutter/Flutter-Debug.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "ephemeral/Flutter-Generated.xcconfig"

dev/benchmarks/macrobenchmarks/macos/Flutter/Flutter-Release.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "ephemeral/Flutter-Generated.xcconfig"

dev/integration_tests/flutter_driver_screenshot_test/ios/Flutter/Debug.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

dev/integration_tests/flutter_driver_screenshot_test/ios/Flutter/Release.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

dev/integration_tests/flutter_gallery/ios/Flutter/Debug.xcconfig

 #include "Generated.xcconfig"
-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"

dev/integration_tests/flutter_gallery/ios/Flutter/Release.xcconfig

 #include "Generated.xcconfig"
-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"

dev/integration_tests/flutter_gallery/macos/Flutter/Flutter-Debug.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "ephemeral/Flutter-Generated.xcconfig"

dev/integration_tests/flutter_gallery/macos/Flutter/Flutter-Release.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "ephemeral/Flutter-Generated.xcconfig"

dev/integration_tests/ios_app_with_extensions/ios/Flutter/Debug.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

dev/integration_tests/ios_app_with_extensions/ios/Flutter/Release.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

dev/integration_tests/release_smoke_test/ios/Flutter/Debug.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

dev/integration_tests/release_smoke_test/ios/Flutter/Release.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

packages/flutter_tools/lib/src/macos/cocoapods.dart

@@ -272,7 +272,7 @@ class CocoaPods {
     final File file = xcodeProject.xcodeConfigFor(mode);
     if (file.existsSync()) {
       final String content = file.readAsStringSync();
-      final String include = '#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.${mode
+      final String include = '#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.${mode
           .toLowerCase()}.xcconfig"';
       if (!content.contains(include)) {
         file.writeAsStringSync('$include\n$content', flush: true);

packages/flutter_tools/templates/module/ios/host_app_ephemeral_cocoapods/Config.tmpl/Debug.xcconfig

 #include "Flutter.xcconfig"
-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"

packages/flutter_tools/templates/module/ios/host_app_ephemeral_cocoapods/Config.tmpl/Release.xcconfig

 #include "Flutter.xcconfig"
-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"

packages/flutter_tools/test/commands.shard/permeable/packages_test.dart

@@ -124,13 +124,13 @@ void main() {
     ];
 
     const Map<String, String> pluginContentWitnesses = <String, String>{
-      'ios/Flutter/Debug.xcconfig': '#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"',
-      'ios/Flutter/Release.xcconfig': '#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"',
+      'ios/Flutter/Debug.xcconfig': '#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"',
+      'ios/Flutter/Release.xcconfig': '#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"',
     };
 
     const Map<String, String> modulePluginContentWitnesses = <String, String>{
-      '.ios/Config/Debug.xcconfig': '#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"',
-      '.ios/Config/Release.xcconfig': '#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"',
+      '.ios/Config/Debug.xcconfig': '#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"',
+      '.ios/Config/Release.xcconfig': '#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"',
     };
 
     void expectDependenciesResolved(String projectPath) {

packages/flutter_tools/test/general.shard/macos/cocoapods_test.dart

@@ -273,11 +273,11 @@ void main() {
 
       final String debugContents = projectUnderTest.ios.xcodeConfigFor('Debug').readAsStringSync();
       expect(debugContents, contains(
-          '#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"\n'));
+          '#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"\n'));
       expect(debugContents, contains('Existing debug config'));
       final String releaseContents = projectUnderTest.ios.xcodeConfigFor('Release').readAsStringSync();
       expect(releaseContents, contains(
-          '#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"\n'));
+          '#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"\n'));
       expect(releaseContents, contains('Existing release config'));
     }, overrides: <Type, Generator>{
       FileSystem: () => fileSystem,
@@ -305,11 +305,11 @@ void main() {
 
       final String debugContents = projectUnderTest.ios.xcodeConfigFor('Debug').readAsStringSync();
       expect(debugContents, contains(
-          '#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"\n'));
+          '#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"\n'));
       expect(debugContents, contains('Existing debug config'));
       final String releaseContents = projectUnderTest.ios.xcodeConfigFor('Release').readAsStringSync();
       expect(releaseContents, contains(
-          '#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"\n'));
+          '#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"\n'));
       expect(releaseContents, contains('Existing release config'));
     }, overrides: <Type, Generator>{
       FileSystem: () => fileSystem,

packages/integration_test/example/ios/Flutter/Debug.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

packages/integration_test/example/ios/Flutter/Release.xcconfig

-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"