The results of the echo detector complexity tests are currently notoriously spiky and unreliable. The following improvements are made in this CL:
- Significantly longer warmup time before starting the test
- More iterations and larger batches
- Different number of iterations for slow and fast tests
- Use the echo likelihood in the test so it cannot get optimized out
BUG=webrtc:7353
Review-Url: https://codereview.webrtc.org/2750413002
Cr-Commit-Position: refs/heads/master@{#17303}