FileDisplayActivityIT.showShares: open share view through menu

This is more correct, and also seems to prevent random recyclerview crashes in CI

Signed-off-by: Álvaro Brey <alvaro.brey@nextcloud.com>

app/src/androidTest/java/com/nextcloud/client/FileDisplayActivityIT.java

@@ -116,7 +116,12 @@ public class FileDisplayActivityIT extends AbstractOnServerIT {
 
         getInstrumentation().waitForIdleSync();
 
-        EventBus.getDefault().post(new SearchEvent("", SearchRemoteOperation.SearchType.SHARED_FILTER));
+        // open drawer
+        onView(withId(R.id.drawer_layout)).perform(DrawerActions.open());
+
+        // click "shared"
+        onView(withId(R.id.nav_view))
+            .perform(NavigationViewActions.navigateTo(R.id.nav_shared));
 
         shortSleep();
         shortSleep();