Adding flag com.android.healthfitness.flags.expressive_theming_enabled to trunk_staging.

This change was automatically created by advancing the Gantry workflow at:
https://releasetracker.partner.android.com/changes/d4dgofi000001?build_unique_id=android_platform_health_fitness_aconfig
Do not edit this file manually or revert this change - use the Gantry workflow to manage the state of this flag.

Bug: 376085738
Change-Id: I1204d3667d4e35a0c75b7c644c2dd80dc73ce8e6
Flag: com.android.healthfitness.flags.expressive_theming_enabled
Ignore-AOSP-First: AConfig change for future AOSP release
1 file changed