[fenix] For https://github.com/mozilla-mobile/fenix/issues/16830: Increase the Show in private sessions option in Search Preferences Settings (https://github.com/mozilla-mobile/fenix/pull/18689)

* For https://github.com/mozilla-mobile/fenix/issues/18242 - Wire up "Sync cards across devices" preference with SyncPreferenceView (https://github.com/mozilla-mobile/fenix/pull/18605)

* For https://github.com/mozilla-mobile/fenix/issues/16830: Increase the Show in private sessions option in Search Preferences Settings

Co-authored-by: Gabriel Luong <gabriel.luong@gmail.com>

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

@@ -7,6 +7,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:minHeight="48dp"
     android:background="?android:selectableItemBackground"
     android:clickable="true"
     android:focusable="true"