Correctly extract execution mode when more 'misc' bits are set.
Correctly extract execution mode when more 'misc' bits are set.

A sample event may have misc bits set other than the CPU mode. For example,
when collecting precise events, PERF_RECORD_MISC_EXACT_IP is set.

PiperOrigin-RevId: 172140181

google/perf_data_converter,google/perf_data_converter,google/perf_data_converter