Merge "Implement unique_fd.ok()" am: c9ec95272c Change-Id: I6030fd103c9df905c84161817560c55330627345 Cr-Mirrored-From: https://chromium.googlesource.com/aosp/platform/system/core Cr-Mirrored-Commit: 90fec0a0b4447eeb99ccfdd1afc28cd9ea879181