protozero: Make generated cpp enum/class order stable am: d85805a32e am: 7df2956efc am: b5f82909c7
protozero: Make generated cpp enum/class order stable am: d85805a32e am: 7df2956efc
am: b5f82909c7

Change-Id: Ic287efc79acd080a723a35585805777c0926f924

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