Merge "Make sure a pinned slice with given uri exists before calling unpin."

        verifyCaller(pkg);

        enforceAccess(pkg, uri);

        uri = maybeAddUserId(uri, Binder.getCallingUserHandle().getIdentifier());

        if (getPinnedSlice(uri).unpin(pkg, token)) {

        try {

            PinnedSliceState slice = getPinnedSlice(uri);

            if (slice != null && slice.unpin(pkg, token)) {

                removePinnedSlice(uri);

            }

        } catch (IllegalStateException exception) {

            Slog.w(TAG, exception.getMessage());

        }

    }

    @Override