Upadate CHANGELOG for v15.0 am: 8220de2b7f am: 07b2863478 am: 8ff38b330c
Upadate CHANGELOG for v15.0 am: 8220de2b7f am: 07b2863478 am: 8ff38b330c

Original change: https://android-review.googlesource.com/c/platform/external/perfetto/+/1697166

Change-Id: I696f4171bdde2eb1859e91ea4e9d8747291083b6

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