Update x asset with tint.

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

@@ -12,7 +12,7 @@
         android:layout_width="match_parent"
         android:layout_height="@dimen/signal_m3_toolbar_height"
         android:minHeight="@dimen/signal_m3_toolbar_height"
-        app:navigationIcon="@drawable/ic_x"
+        app:navigationIcon="@drawable/ic_x_tinted"
         app:title="@string/ContactShareEditActivity__edit_name"
         app:titleTextAppearance="@style/Signal.Text.TitleLarge" />