Update colors for FrameTimeline actual slices - part 2
Update colors for FrameTimeline actual slices - part 2

Addressing a nit from the previous CL in aosp/1640100.

Bug: 181726082
Test: None
Change-Id: Id86c366d198dca5ad914924ab6d64653c0e7cf6e

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