Update CHANGELOG for v21.0 am: ea72787a8b am: 08bc24d088 am: ef688471f1 am: 96003dd8ab
Update CHANGELOG for v21.0 am: ea72787a8b am: 08bc24d088 am: ef688471f1 am: 96003dd8ab

Original change: https://android-review.googlesource.com/c/platform/external/perfetto/+/1878364

Change-Id: Ie75feb01ac868e423f788896bf7a78474b5ddbb2

google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto