ui: Update ui/README.md am: c5c000f3b1 am: 532e10d693 am: c6306cf4b1
ui: Update ui/README.md am: c5c000f3b1 am: 532e10d693 am: c6306cf4b1

Original change: https://android-review.googlesource.com/c/platform/external/perfetto/+/1900392

Change-Id: Ic4b65127043e50518e49a0e0eee47271041fdf8c

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