Adding flag com.android.intentresolver.keyboard_navigation_fix to trunk_staging.

This change was automatically created by advancing the Gantry workflow at:
https://releasetracker.partner.android.com/changes/ff58bdi000001?build_unique_id=Frontend:+android_platform_intentresolver,+Study:+ComAndroidIntentresolverKeyboardNavigationFixLaunch
Do not edit this file manually or revert this change - use the Gantry workflow to manage the state of this flag.

Bug: 325259478
Change-Id: Icc05c2987d22292723c47099804f059dae9f2e7b
Flag: com.android.intentresolver.keyboard_navigation_fix
Ignore-AOSP-First: AConfig change for future AOSP release
3 files changed