[FSSDK-12546] Prepare for release java SDK v4.4.0

Author: jaeopt

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Optimizely Java X SDK Changelog
 
+## [4.4.0]
+Apr 29, 2026
+
+### New Features
+
+**Feature Rollout**: Introduced Feature Rollout capabilities. Feature Rollouts represent a new experiment type merging Targeted Delivery simplicity with A/B test measurement capabilities. See [Feature Rollout docs](https://docs.developers.optimizely.com/feature-experimentation/docs/cmab-cache-config-for-the-java-sdk ) for implementation details.
+
 ## [4.3.1]
 Jan 20, 2025