Remove sending broadcast when StatsLogProcessor is being initialized as

its clients have not started to receive broadcasts

This also fixes broken statsd_test's which happens whenever there are
files in /data/misc/stats-data/ which is generated right before reboots.
This would delay the upload time from right after reboot to next upload
cycle but it should not be an issue.

Bug: 73089712
Test: statsd_test
Change-Id: Ida81099c9c9e54804a0c3b3b349096312ef570bc