Center the terms link on the welcome fragment for long translations.

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

@@ -36,6 +36,7 @@
         android:layout_height="wrap_content"
         android:layout_marginBottom="24dp"
         android:text="@string/RegistrationActivity_terms_and_privacy"
+        android:gravity="center"
         android:textColor="@color/core_ultramarine"
         app:layout_constraintBottom_toTopOf="@+id/welcome_continue_button"
         app:layout_constraintEnd_toEndOf="@+id/welcome_continue_button"