This reverts commit b0ac94307e1787f83de2b9a2dc3b58309ea8654b. Reason for revert: failing upstream tests Original change's description: > Avoid encrypting empty audio packet. > > Bug: b/132861665 > Change-Id: I161ba8697ae88857927f27fa6d3914b7201fdeab > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/137049 > Commit-Queue: Minyue Li <minyue@webrtc.org> > Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> > Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#28006} TBR=brandtr@webrtc.org,kwiberg@webrtc.org,minyue@webrtc.org Change-Id: I856436ad78bcc5310810283bb5547070781d0684 No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: b/132861665 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/137518 Reviewed-by: Minyue Li <minyue@webrtc.org> Commit-Queue: Minyue Li <minyue@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28009}