Enable vibration thread callback fix flag in tests

Enable the fix for how VibrationThread handles vibration callbacks to
one-shot and waveform tests that are flaky without the fix.

Also fix a couple of start/end timings that are flaky.

Fix: 400029477
Test: VibrationThreadTest
Flag: EXEMPT test only
Change-Id: Ie37cff90dec23b5537b63629fa749c57e6ab8dcf