Android 17 Beta 2 introduces a manifest-level gate under Advanced Protection Mode that blocks non-accessibility apps from accessing the Accessibility Services API, directly targeting a persistent abuse vector used by banking trojans (Anatsa, Cerberus), stalkerware, and commercial spyware (MITRE T1417, T1516). This is an informational security story with no CVE or active exploitation; it represents a proactive architectural control rather than a reactive patch. Security teams should assess MDM capability to enforce AAPM enrollment for high-risk user populations, audit current Accessibility Services grants on managed Android devices, and monitor the Android 17 stable release timeline and Play Store policy updates for enforcement expansion.