Fix flutter create warning regarding Java compatibility (flutter#152836)

This PR modifies the warning message regarding Java compatibility to make it consistent with the Flutter style guide.

**Current message looks like this**
```
[RECOMMENDED] If so, to keep the default AGP version 8.1.0, make
sure to download a compatible Java version
(Java 17 <= compatible Java version < Java 21).
You may configure this compatible Java version by running:
`flutter config --jdk-dir=<JDK_DIRECTORY>`
Note that this is a global configuration for Flutter.

Alternatively, to continue using your configured Java version, update the AGP
version specified in the following files to a compatible AGP
version (minimum compatible AGP version: 7.0) as necessary:
    -   /home/user/project/testproj/android/build.gradle

See
https://developer.android.com/build/releases/gradle-plugin for details on
compatible Java/AGP versions.
```

**After Modification**

```
To keep the default AGP version 8.1.0, download a compatible Java version 
(Java 17 <= compatible Java version < Java 21). Configure this Java version 
globally for Flutter by running:

  flutter config --jdk-dir=<JDK_DIRECTORY>

Alternatively, to continue using your current Java version, update the AGP 
version in the following file(s) to a compatible version (minimum AGP version: 7.0):

  /home/user/project/testproj/android/build.gradle

For details on compatible Java and AGP versions, see
https://developer.android.com/build/releases/gradle-plugin
```

Fixes flutter#152460

Author: shashwatpathak98

packages/flutter_tools/lib/src/commands/create.dart

@@ -959,19 +959,17 @@ used.
   // AGP template version incompatible with Java version.
   final gradle.JavaAgpCompat? minimumCompatibleAgpVersion = gradle.getMinimumAgpVersionForJavaVersion(globals.logger, javaV: javaVersion);
   final String compatibleAgpVersionMessage = minimumCompatibleAgpVersion == null ? '' : ' (minimum compatible AGP version: ${minimumCompatibleAgpVersion.agpMin})';
-  final String gradleBuildFilePaths = '    -  ${_getBuildGradleConfigurationFilePaths(projectType, projectDirPath)!.join('\n    - ')}';
+  final String gradleBuildFilePaths = '    ${_getBuildGradleConfigurationFilePaths(projectType, projectDirPath)!.join('\n    - ')}';
 
   globals.printWarning('''
 $incompatibleVersionsAndRecommendedOptionMessage
 
-Alternatively, to continue using your configured Java version, update the AGP
-version specified in the following files to a compatible AGP
-version$compatibleAgpVersionMessage as necessary:
+Alternatively, to continue using your current Java version, update the AGP
+version in the following file(s) to a compatible version$compatibleAgpVersionMessage:
 $gradleBuildFilePaths
 
-See
-https://developer.android.com/build/releases/gradle-plugin for details on
-compatible Java/AGP versions.
+For details on compatible Java and AGP versions, see
+https://developer.android.com/build/releases/gradle-plugin
 ''',
     emphasis: true
   );
@@ -994,12 +992,11 @@ String getIncompatibleJavaGradleAgpMessageHeader(
   return '''
 The configured version of Java detected may conflict with the $incompatibleDependency version in your new Flutter $projectType.
 
-[RECOMMENDED] If so, to keep the default $incompatibleDependencyVersion, make
-sure to download a compatible Java version
-$validJavaRangeMessage.
-You may configure this compatible Java version by running:
-`flutter config --jdk-dir=<JDK_DIRECTORY>`
-Note that this is a global configuration for Flutter.
+To keep the default AGP version $incompatibleDependencyVersion, download a compatible Java version
+(Java 17 <= $validJavaRangeMessage Java version < Java 21). Configure this Java version
+globally for Flutter by running:
+
+  flutter config --jdk-dir=<JDK_DIRECTORY>
 ''';
 }
 

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

@@ -3926,6 +3926,22 @@ void main() {
     ),
     ProcessManager: () => fakeProcessManager,
   });
+
+  testUsingContext('flutter create should show the incompatible java AGP message', () async {
+    Cache.flutterRoot = '../..';
+
+    final CreateCommand command = CreateCommand();
+    final CommandRunner<void> runner = createTestCommandRunner(command);
+
+    await runner.run(<String>['create', '--no-pub', '--platforms=android', projectDir.path]);
+
+    final String expectedMessage = getIncompatibleJavaGradleAgpMessageHeader(false, templateDefaultGradleVersion, templateAndroidGradlePluginVersion, 'app');
+
+    expect(logger.warningText, contains(expectedMessage));
+  }, overrides: <Type, Generator>{
+    Java: () => FakeJava(version: const software.Version.withText(500, 0, 0, '500.0.0')), // Too high a version for template Gradle versions.
+    Logger: () => logger,
+  });
 }
 
 Future<void> _createProject(