SparsifyModel returns absl::Status instead of TfLiteStatus.
SparsifyModel returns absl::Status instead of TfLiteStatus.

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/12892 from shraiysh:CR-valid-iteration-annotator f5714a8053db0892c950b1e5268f249ff64b2e7b
