Merge "Don't duplicate uapi ioprio constants." into main am: 46c366b0ed

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2759694

Change-Id: I6bfe444c1ed43240506d9031796bd1cf03a97ef8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>