Merge "Remove redundant "using" statement" am: fa017ea2e4 am: d022d49a39 am: 60762e32a6

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1993951

Change-Id: I9287b7f2d1a9e395cadcc0c52d7e1eb442e48903