Fix: keyboard visible even after search screen is dismissed

feature/search/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/search/SearchScreen.kt

@@ -210,7 +210,8 @@ fun EmptySearchResultBody(
         horizontalAlignment = Alignment.CenterHorizontally,
         modifier = Modifier.padding(horizontal = 48.dp),
     ) {
-        val message = stringResource(id = searchR.string.feature_search_result_not_found, searchQuery)
+        val message =
+            stringResource(id = searchR.string.feature_search_result_not_found, searchQuery)
         val start = message.indexOf(searchQuery)
         Text(
             text = AnnotatedString(
@@ -443,11 +444,17 @@ private fun SearchToolbar(
     onBackClick: () -> Unit,
     modifier: Modifier = Modifier,
 ) {
+    val keyboardController = LocalSoftwareKeyboardController.current
     Row(
         verticalAlignment = Alignment.CenterVertically,
         modifier = modifier.fillMaxWidth(),
     ) {
-        IconButton(onClick = { onBackClick() }) {
+        IconButton(
+            onClick = {
+                keyboardController?.hide()
+                onBackClick()
+            },
+        ) {
             Icon(
                 imageVector = NiaIcons.ArrowBack,
                 contentDescription = stringResource(