dscp_policy - use a more efficient v6_equal() am: 3fc472dd39

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2101050

Change-Id: I6a58445bda7e4bf62e24868b386b0f0c326705f7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>