Merge "Don't duplicate uapi ioprio constants." into main am: 46c366b0ed am: de1aeee88d

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

Change-Id: I75c2bdd4423158ad9749212cf1fa35726ecd97c8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>