Fix label text wrapping in expansion panels gallery demo (#7103)

examples/flutter_gallery/lib/demo/expansion_panels_demo.dart

@@ -49,8 +49,15 @@ class DualHeaderWithHint extends StatelessWidget {
           flex: 2,
           child: new Container(
             margin: const EdgeInsets.only(left: 24.0),
-            child: new Text(name, style: textTheme.body1.copyWith(fontSize: 15.0))
-          )
+            child: new FittedBox(
+              fit: ImageFit.scaleDown,
+              alignment: FractionalOffset.centerLeft,
+              child: new Text(
+                name,
+                style: textTheme.body1.copyWith(fontSize: 15.0),
+              ),
+            ),
+          ),
         ),
         new Expanded(
           flex: 3,
@@ -178,7 +185,7 @@ class _ExpansionPanelsDemoState extends State<ExpasionPanelsDemo> {
 
     _demoItems = <DemoItem<dynamic>>[
       new DemoItem<String>(
-        name: 'Trip name',
+        name: 'Trip',
         value: 'Caribbean cruise',
         hint: 'Change trip name',
         valueToString: (String value) => value,
@@ -282,9 +289,9 @@ class _ExpansionPanelsDemoState extends State<ExpasionPanelsDemo> {
         }
       ),
       new DemoItem<double>(
-        name: 'Sun amount',
+        name: 'Sun',
         value: 80.0,
-        hint: 'Select amount of sun',
+        hint: 'Select sun level',
         valueToString: (double amount) => '${amount.round()}',
         builder: (DemoItem<double> item) { // ignore: argument_type_not_assignable, https://github.com/flutter/flutter/issues/5771
           void close() {