packagegroup-connectivity: Add Copyright and License for reuse compliance

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-ohos-core/recipes-core/packagegroups/packagegroup-connectivity.bb

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
 DESCRIPTION = "Networking and connectivity package group"
 
 inherit packagegroup