atrace: Remove persisitent rss_stat_throttled trigger

It was found that the persistent rss_stat_throttled event trigger
causes a 8% incease in kswapd CPU usage. So remove this persistent
trigger, instead perfetto will dynamically create the trigger when
needed.

Test: adb push test/configs/rss_stat.cfg /data/local/tmp/
        && cf-adb shell 'cat /data/local/tmp/rss_stat.cfg |
        perfetto --txt -c - -o /data/misc/perfetto-traces/trace
Bug: 236172293
Change-Id: I70a978de1fbf2ed538bb869edc715e61aee7efa4
Merged-In: I70a978de1fbf2ed538bb869edc715e61aee7efa4