simpleperf: Loose time constraint to fix flaky test.

DO NOT MERGE

Bug: 179088910
Bug: 199771629

Test: run simpleperf_unit_test
Change-Id: Ia58a5bd6e9bfff4ef208701f43541ba98a97fba0
(cherry picked from commit 3c1f59fcd18527d58bc42f3e1e73981594bb1b9b)
1 file changed