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: Ib708da7da105b7b16c631df6c4cc309ab5878c5c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>