Fix bug where search wasn't focused in contact select.

Introduced in c0a44c7fc388089e39a0cdbd79228032e76be7b0.
Apparently targetSdk 28 changed the view focus model.
We have to manually focus this particular view now.

src/org/thoughtcrime/securesms/components/ContactFilterToolbar.java

@@ -97,6 +97,7 @@ public class ContactFilterToolbar extends Toolbar {
     setLogo(null);
     setContentInsetStartWithNavigation(0);
     expandTapArea(toggleContainer, dialpadToggle);
+    searchText.requestFocus();
   }
 
   public void clear() {