Fix a potential thread safety issue in VectorDrawable

    private final Rect mTmpBounds = new Rect();

    public VectorDrawable() {

        this(new VectorDrawableState(null), null);

        this(null, null);

    }

    /**

     * The one constructor to rule them all. This is called by all public

     * constructors to set the state and initialize local properties.

     */

    private VectorDrawable(@NonNull VectorDrawableState state, @Nullable Resources res) {

        mVectorState = state;

    private VectorDrawable(@Nullable VectorDrawableState state, @Nullable Resources res) {

        // As the mutable, not-thread-safe native instance is stored in VectorDrawableState, we

        // need to always do a defensive copy even if mutate() isn't called. Otherwise

        // draw() being called on 2 different VectorDrawable instances could still hit the same

        // underlying native object.

        mVectorState = new VectorDrawableState(state);

        updateLocalState(res);

    }