Set low ring buffer size for preemptive background tracing on Android

Change-Id: I6cc93c62ca8c8d96929d3184f4b17b83d5371e63
Reviewed-on: https://chromium-review.googlesource.com/c/1330021
Reviewed-by: oysteine <oysteine@chromium.org>
Commit-Queue: ssid <ssid@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606939}
1 file changed