8175444111
j.u.Optional isn't available for sdk version <24 and our minsdk is 21. Bug: webrtc:351858995 Change-Id: Iadf50a96fc5462d16b53857116fab271cecc8c3c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/374061 Reviewed-by: Sergey Silkin <ssilkin@webrtc.org> Auto-Submit: Ranveer Aggarwal <ranvr@webrtc.org> Reviewed-by: Zoé Lepaul <xalep@webrtc.org> Commit-Queue: Sergey Silkin <ssilkin@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43935}