trace_processor_shell: Add flag to execute queries before metrics
trace_processor_shell: Add flag to execute queries before metrics

This flag will be used to load the device power profile data into
trace processor before running the metric.

Bug: 158459921
Change-Id: I8849a5082ede0ae2ba4449f9350f7a2f7ba14b03
google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto