EffectReverbTest: Reduce runtime by limiting combinations tested

Instead of running the tests for all channel masks, sampling rates
etc, tests are now run on a subset of these in order to keep the
runtime low.

Also, re-enable host side test that was suspended due to high runtime.

Bug: 269868814
Test: atest --host EffectReverbTest
Change-Id: Id3713d6c31f817cee681be2ad8f397eea298fa62