ui: add missing cast for idle counters am: 84ab9b3dd3 am: 4d42f73e69 am: 6feba052d2 am: 20037f70e4
ui: add missing cast for idle counters am: 84ab9b3dd3 am: 4d42f73e69 am: 6feba052d2 am: 20037f70e4

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

Change-Id: Ifdeda617f46b7dd6d8a447c0d1e13eeace231296

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