Adapt wording for required Android SDK for plugins (flutter#140043)

Solves flutter#137115 (comment)

Author: Gustl22

packages/flutter_tools/gradle/src/main/groovy/flutter.groovy

@@ -441,7 +441,7 @@ class FlutterPlugin implements Plugin<Project> {
         pluginProject.afterEvaluate {
             // Checks if there is a mismatch between the plugin compileSdkVersion and the project compileSdkVersion.
             if (pluginProject.android.compileSdkVersion > project.android.compileSdkVersion) {
-                project.logger.quiet("Warning: The plugin ${pluginName} requires Android SDK version ${getCompileSdkFromProject(pluginProject)}.")
+                project.logger.quiet("Warning: The plugin ${pluginName} requires Android SDK version ${getCompileSdkFromProject(pluginProject)} or higher.")
                 project.logger.quiet("For more information about build configuration, see $kWebsiteDeploymentAndroidBuildConfig.")
             }
 

packages/flutter_tools/test/integration.shard/android_plugin_compilesdkversion_mismatch_test.dart

@@ -77,7 +77,7 @@ void main() {
     expect(
         result.stdout,
         contains(
-            'Warning: The plugin test_plugin requires Android SDK version 31.'));
+            'Warning: The plugin test_plugin requires Android SDK version 31 or higher.'));
     expect(
       result.stderr,
       contains('One or more plugins require a higher Android SDK version.'),