What's Changed

• Cherrypick DTensor docstring fix for 2.9 release. by @qlzh727 in https://github.com/keras-team/keras/pull/16434
• Cherrypick for RandomContrast update by @qlzh727 in https://github.com/keras-team/keras/pull/16435
• Cherrypick ImageAugmetation related change to R2.9 by @qlzh727 in https://github.com/keras-team/keras/pull/16454

Full Changelog: https://github.com/keras-team/keras/compare/v2.9.0-rc1...v2.9.0-rc2