Revert "Revert "Use AndroidX in new projects by default (#40925)" (#40995)" (#41001)

This reverts commit 8e231796272f7f14391ca9c6b40392bc20f96aeb.

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

diff --git a/packages/flutter_tools/lib/src/commands/create.dart b/packages/flutter_tools/lib/src/commands/create.dart
index 2e5ad13..4c35620 100644
--- a/packages/flutter_tools/lib/src/commands/create.dart
+++ b/packages/flutter_tools/lib/src/commands/create.dart
@@ -141,7 +141,7 @@
     argParser.addFlag(
       'androidx',
       negatable: true,
-      defaultsTo: false,
+      defaultsTo: true,
       help: 'Generate a project using the AndroidX support libraries',
     );
     // Deprecated
@@ -398,7 +398,7 @@
 
     final String relativeDirPath = fs.path.relative(projectDirPath);
     if (!projectDir.existsSync() || projectDir.listSync().isEmpty) {
-      printStatus('Creating project $relativeDirPath...');
+      printStatus('Creating project $relativeDirPath... androidx: ${argResults['androidx']}');
     } else {
       if (sampleCode != null && !argResults['overwrite']) {
         throwToolExit('Will not overwrite existing project in $relativeDirPath: '