Make the pub roller bot re-generate gradle lockfiles (#149355)

Fixes https://github.com/flutter/flutter/issues/142475

dev/conductor/core/lib/src/packages_autoroller.dart

@@ -5,6 +5,8 @@
 import 'dart:convert';
 import 'dart:io' as io;
 
+import 'package:file/file.dart';
+import 'package:meta/meta.dart';
 import 'package:process/process.dart';
 
 import 'git.dart';
@@ -93,6 +95,7 @@ This PR was generated by the automated
         log('Packages are already at latest.');
         return;
       }
+      await generateGradleLockfiles(await framework.checkoutDirectory);
       await pushBranch();
       await createPr(repository: await framework.checkoutDirectory);
       await authLogout();
@@ -135,6 +138,15 @@ This PR was generated by the automated
     return true;
   }
 
+  @visibleForTesting
+  Future<void> generateGradleLockfiles(Directory repoRoot) async {
+    await framework.runDart(<String>[
+      '${repoRoot.path}/dev/tools/bin/generate_gradle_lockfiles.dart',
+      '--no-gradle-generation',
+      '--no-exclusion',
+    ]);
+  }
+
   Future<void> pushBranch() async {
     final String projectName = framework.mirrorRemote!.url.split(r'/').last;
     // Encode the token into the remote URL for authentication to work

dev/conductor/core/lib/src/repository.dart

@@ -601,6 +601,13 @@ class FrameworkRepository extends Repository {
     ]);
   }
 
+  Future<io.ProcessResult> runDart(List<String> args) async {
+    return processManager.run(<String>[
+      fileSystem.path.join((await checkoutDirectory).path, 'bin', 'dart'),
+      ...args,
+    ]);
+  }
+
   Future<io.ProcessResult> runFlutter(List<String> args) async {
     await _ensureToolReady();
     return processManager.run(<String>[

dev/conductor/core/test/packages_autoroller_test.dart

@@ -432,6 +432,12 @@ void main() {
         'rev-parse',
         'HEAD',
       ], stdout: '000deadbeef'),
+      const FakeCommand(command: <String>[
+        '$checkoutsParentDirectory/flutter_conductor_checkouts/framework/bin/dart',
+        '$checkoutsParentDirectory/flutter_conductor_checkouts/framework/dev/tools/bin/generate_gradle_lockfiles.dart',
+        '--no-gradle-generation',
+        '--no-exclusion',
+      ]),
       const FakeCommand(command: <String>[
         'git',
         'push',