trace: Handle new field format for sched_energy_diff

There is a new format for the sched_energy_diff trace event in EAS code in the
Android common kernel:

https://android.googlesource.com/kernel/common/+/6aab3e4a9266fb661638e37ad4745573aff6de5c%5E%21/

Add support for parsing this format in Trace, by translating equivalent field
names and making unmatched fields optional.