[automerger skipped] DO NOT MERGE Use explicitly opened file with O_WRONLY in test_sendfile_errno am: f0324559dd -s ours am: b800078f99 -s ours am: 4c2c16a044 -s ours am: 014b3ea94b -s ours am: 1ee27cb06b -s ours

am skip reason: subject contains skip directive

Original change: https://android-review.googlesource.com/c/platform/libcore/+/2241795

Change-Id: I188ef117cfa09a7314d5568a6682552933eee34e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>