Revert "Disable AUDIO_FEATURE_ENABLED_EXTN_RESAMPLER feature"

This reverts commit 4981bea0.
- EXTN_RESAMPLER feature flag is disabled earlier to fix compile issues
  But disabling feature flag has side effect where it causes pop noise
  in some usecases.
- Earlier compilation issue is fixed so re-enable the feature flag.

CRs-Fixed: 2222756
Change-Id: Icf955140939640da0fe6e1df8091e708d02349d1