Removed LOG_HIST_FLUSH

Turning audio on and off does not cause this event to be
written to the buffer. Now, a call to dumpsys media.log
simply writes to console an analysis of the data in memory,
and does not delete it afterwards.

Test: dumpsys media.log

Change-Id: Ie75fb27ec4050fb3891635f4c7933196cfd03643
4 files changed