appAutoUpdatePolicy property
Recommended alternative: autoUpdateMode which is set per app, provides greater flexibility around update frequency.When autoUpdateMode is set to AUTO_UPDATE_POSTPONED or AUTO_UPDATE_HIGH_PRIORITY, this field has no effect.The app auto update policy, which controls when automatic app updates can be applied. Possible string values are:
- "APP_AUTO_UPDATE_POLICY_UNSPECIFIED" : The auto-update policy is not set. Equivalent to CHOICE_TO_THE_USER.
 - "CHOICE_TO_THE_USER" : The user can control auto-updates.
 - "NEVER" : Apps are never auto-updated.
 - "WIFI_ONLY" : Apps are auto-updated over Wi-Fi only.
 - "ALWAYS" : Apps are auto-updated at any time. Data charges may apply.
 
Implementation
core.String? appAutoUpdatePolicy;