Merge "Remove ununsed 'using namespace std'" into main am: 39fede2d9c am: c2f8fb6026

Original change: https://android-review.googlesource.com/c/platform/hardware/ril/+/3098158

Change-Id: Ibbdd6ace5b843712b955f5777dbe6b26b156e35a
Signed-off-by: Automerger Merge Worker <[email protected]>