[FSSDK-12546] prepare for release java v4.4.0

Author: jaeopt

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Optimizely Java X SDK Changelog
 
+## [4.4.0]
+May 4, 2026
+
+### New Features
+
+**Feature Rollout**: Added support for Feature Rollouts, a new experiment type
+combining Targeted Delivery simplicity with A/B test measurement capabilities.
+Feature Rollouts enable progressive rollouts with full impact analytics, metric tracking,
+and confidence intervals.
+See [Feature Rollout docs](https://support.optimizely.com/hc/en-us/articles/45552846481037-Run-Feature-Rollouts-in-Feature-Experimentation) for more information.
+
 ## [4.3.1]
 Jan 20, 2025
 

gradle.properties

@@ -1,5 +1,5 @@
 # Maven version
-version = 3.1.0-SNAPSHOT
+version = 4.4.0
 
 # Artifact paths
 mavenS3Bucket = optimizely-maven