make the logblame power toggle test slightly better

(cherry-picked from commit 0e71236dd63c13a7626516488cb44d10e98e09f0)

Signed-off-by: Joe Onorato <joeo@google.com>
Bug: 37252687
Test: development/tools/logblame/power_toggle_test
Change-Id: Ie218bb0094bf1574de2e9ab51775984f4969307f
1 file changed