[CleanUp]:remove runBlocking warning in cardBrowser.kt by converting searchCards to suspend function

Author: Fandroid745

AnkiDroid/src/test/java/com/ichi2/anki/CardBrowserTest.kt

@@ -878,7 +878,9 @@ class CardBrowserTest : RobolectricTest() {
             viewModel.changeCardOrder(SortType.EASE) // reverse the list
 
             viewModel.setCardsOrNotes(NOTES)
-            searchCards()
+            runTest{
+                searchCards()
+            }
 
             assertThat(
                 "Card Browser has the new noteSortType field",
@@ -1011,7 +1013,9 @@ class CardBrowserTest : RobolectricTest() {
             val cardBrowser = getBrowserWithNotes(3, true)
 
             cardBrowser.viewModel.setCardsOrNotes(CARDS)
-            cardBrowser.searchCards()
+            runTest {
+                cardBrowser.searchCards()
+            }
 
             advanceRobolectricLooper()
             // check if we get both cards of each note
@@ -1681,13 +1685,14 @@ val CardBrowser.columnHeadings
     get() =
         columnHeadingViews.map { it.text.toString() }
 
-fun CardBrowser.searchCards(search: String? = null) {
+suspend fun CardBrowser.searchCards(search: String? = null) {
     if (search != null) {
         viewModel.launchSearchForCards(search)
     } else {
         viewModel.launchSearchForCards()
     }
-    runBlocking { viewModel.searchJob?.join() }
+    viewModel.searchJob?.join()
 }
 
+
 fun CardBrowser.showFindAndReplaceDialog() = cardBrowserFragment.showFindAndReplaceDialog()