ui: add missing cast for idle counters am: 84ab9b3dd3
ui: add missing cast for idle counters am: 84ab9b3dd3

Original change: https://android-review.googlesource.com/c/platform/external/perfetto/+/1371963

Change-Id: I5cd99ebd93d3d505d72dc0b6f23e9622173dd525

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