simpleperf: Fix flaky tests when running in emulator

For test record_cmd#app_option_for_debuggable_app, we may
get about 100 samples for the app. But that is still not
enough to cover the symbols we are testing.

Bug: 341967631
Test: run CtsSimpleperfTestCases
Change-Id: I6e71ff566fc2ee331cc407a0c056a274c9c77db4
1 file changed