Fix misc-unused-using-decls clang-tidy warning am: a669de72d3

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2746183

Change-Id: Ia98172e15552eedda1725be80e7b29a325ff7a85
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>