What is the Play In-App Updates API (immediate vs. flexible) and how does it help maintain security patch adoption?

• A.C) The In-App Updates API uses a push notification to alert users; the update installs silently without user interaction in both modes.
• B.B) The In-App Updates API only works on Android 12+; older devices must use the Play Store app separately.
• C.A) The Play In-App Updates API allows apps to prompt users to update without leaving the app; "immediate" mode forces a full-screen blocking update flow (suitable for critical security patches), while "flexible" mode downloads in the background and prompts the user at a convenient time. This reduces the window of exposure for vulnerabilities in older app versions.
• D.D) Immediate mode restricts the device to only the app being updated, shutting down all other apps including security monitoring apps.