Fix screenshots tests: showDefaultHomeScreen, bookmarksManagementTest

app/src/androidTest/java/org/mozilla/fenix/screenshots/DefaultHomeScreenTest.kt

@@ -31,8 +31,8 @@ class DefaultHomeScreenTest : ScreenshotTest() {
     @Test
     fun showDefaultHomeScreen() {
         homeScreen {
-            verifyAccountsSignInButton()
             swipeToBottom()
+            verifyAccountsSignInButton()
             Screengrab.screenshot("HomeScreenRobot_home-screen-scroll")
             TestAssetHelper.waitingTime
         }

app/src/androidTest/java/org/mozilla/fenix/screenshots/MenuScreenShotTest.kt

@@ -142,8 +142,8 @@ class MenuScreenShotTest : ScreenshotTest() {
         editBookmarkFolder()
         Screengrab.screenshot("ThreeDotMenuBookmarksRobot_edit-bookmark-folder-menu")
         // It may be needed to wait here to have the screenshot
-        mDevice.pressBack()
         bookmarksMenu {
+            navigateUp()
         }.openThreeDotMenu("test") {
             deleteBookmarkFolder()
             Screengrab.screenshot("ThreeDotMenuBookmarksRobot_delete-bookmark-folder-menu")