Make sure that an OutlinedButton doesn't crash in 0x0 environment (flutter#177340)

This is my attempt to handle
flutter#6537 for the OutlinedButton
widget.

Co-authored-by: Tong Mu <dkwingsmt@users.noreply.github.com>

Author: ahmedsameha1

packages/flutter/test/material/outlined_button_test.dart

@@ -3076,4 +3076,17 @@ void main() {
     // The button should still be focused.
     expect(getButtonFocusNode().hasFocus, true);
   });
+
+  testWidgets('OutlinedButton does not crash at zero area', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Center(
+          child: SizedBox.shrink(
+            child: OutlinedButton(onPressed: () {}, child: const Text('X')),
+          ),
+        ),
+      ),
+    );
+    expect(tester.getSize(find.byType(OutlinedButton)), Size.zero);
+  });
 }