[flutter_tool] Retry a gradle build on connection timeout (#143084)

This PR will likely not help with the issue on our CI discussed in
https://github.com/flutter/flutter/issues/142637, but will do one retry
for our users if they hit the same issue.

packages/flutter_tools/lib/src/android/gradle_errors.dart

@@ -112,15 +112,16 @@ final GradleHandledError permissionDeniedErrorHandler = GradleHandledError(
 @visibleForTesting
 final GradleHandledError networkErrorHandler = GradleHandledError(
   test: _lineMatcher(const <String>[
+    "> Could not get resource 'http",
+    'java.io.FileNotFoundException',
     'java.io.FileNotFoundException: https://downloads.gradle.org',
-    'java.io.IOException: Unable to tunnel through proxy',
     'java.io.IOException: Server returned HTTP response code: 502',
+    'java.io.IOException: Unable to tunnel through proxy',
     'java.lang.RuntimeException: Timeout of',
+    'java.net.ConnectException: Connection timed out',
+    'java.net.SocketException: Connection reset',
     'java.util.zip.ZipException: error in opening zip file',
     'javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake',
-    'java.net.SocketException: Connection reset',
-    'java.io.FileNotFoundException',
-    "> Could not get resource 'http",
   ]),
   handler: ({
     required String line,

packages/flutter_tools/test/general.shard/android/gradle_errors_test.dart

@@ -407,6 +407,40 @@ A problem occurred configuring root project 'android'.
       FileSystem: () => fileSystem,
       ProcessManager: () => processManager,
     });
+
+    testUsingContext('retries if connection times out', () async {
+      const String errorMessage = r'''
+Exception in thread "main" java.net.ConnectException: Connection timed out
+java.base/sun.nio.ch.Net.connect0(Native Method)
+  at java.base/sun.nio.ch.Net.connect(Net.java:579)
+  at java.base/sun.nio.ch.Net.connect(Net.java:568)
+  at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:588)
+  at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
+  at java.base/java.net.Socket.connect(Socket.java:633)
+  at java.base/sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:299)
+  at java.base/sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:174)
+  at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:183)
+  at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:498)
+  at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:603)
+  at java.base/sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:266)
+  at java.base/sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:380)''';
+
+      expect(formatTestErrorMessage(errorMessage, networkErrorHandler), isTrue);
+      expect(await networkErrorHandler.handler(
+        line: '',
+        project: FakeFlutterProject(),
+        usesAndroidX: true,
+      ), equals(GradleBuildStatus.retry));
+
+      expect(testLogger.errorText,
+        contains(
+          'Gradle threw an error while downloading artifacts from the network.'
+        )
+      );
+    }, overrides: <Type, Generator>{
+      FileSystem: () => fileSystem,
+      ProcessManager: () => processManager,
+    });
   });
 
   group('permission errors', () {