Add a simplified version of the uxperf processor. This version only
extracts and calculates durations of UX_PERF sections from logcat.
Currently, this does not correlate them agains frames/fps data.
We currently populate results_so_far with a JobOutput for each Job and then a
Result for the RunOutput. This results in a bug when trying to access the
id/label/iteration.
This is fixed by always ensuring the we store Output objects and not
Results (results_so_far is renamed to outputs_so_far to reflect this), and
treating the RunOutput specially in _write_outputs.
- Implemented result processor infrastructured
- Corrected some status tracking issues (differed between states
and output).
- Added "csv" and "status" result processors (these will be the default
enabled).
