Merge "User Switcher: Add a border around add button." into tm-dev

  <TextView

      android:id="@+id/add"

      android:visibility="gone"

      style="@style/Widget.Dialog.Button.BorderButton"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_gravity="center"

      android:gravity="center"

      app:layout_constraintHeight_min="48dp"

      app:layout_constraintEnd_toEndOf="parent"

      app:layout_constraintBottom_toBottomOf="parent"

      android:paddingHorizontal="@dimen/user_switcher_fullscreen_button_padding"

      android:textSize="@dimen/user_switcher_fullscreen_button_text_size"

      android:text="@string/add"

      android:textColor="?androidprv:attr/colorAccentPrimary"

      android:text="@string/add" />

      android:textSize="@dimen/user_switcher_fullscreen_button_text_size"

      android:visibility="gone"

      app:layout_constraintBottom_toBottomOf="parent"

      app:layout_constraintEnd_toEndOf="parent"

      app:layout_constraintHeight_min="48dp" />

</androidx.constraintlayout.widget.ConstraintLayout>