[fenix] Closes https://github.com/mozilla-mobile/fenix/issues/2142: Enable private browsing button is focused instead of Search or address

app/src/main/java/org/mozilla/fenix/home/HomeFragment.kt

@@ -265,6 +265,7 @@ class HomeFragment : Fragment(), AccountObserver {
             nav(R.id.homeFragment, directions)
             requireComponents.analytics.metrics.track(Event.SearchBarTapped(Event.SearchBarTapped.Source.HOME))
         }
+        view.toolbar.requestFocus()
 
         val isPrivate = (activity as HomeActivity).browsingModeManager.isPrivate
 

app/src/main/res/layout/fragment_home.xml

@@ -76,6 +76,7 @@
                 android:layout_marginStart="47dp"
                 android:clickable="true"
                 android:focusable="true"
+                android:focusableInTouchMode="true"
                 android:padding="12dp"
                 android:text="@string/search_hint"
                 android:textColor="?primaryText"