com.android.systemui.accessibility.accessibilitymenu Copy

This is the Accessibility Menu, an Android accessibility service that presents a large on-screen menu for controlling the device without needing precise gestures or hardware buttons. Its AOSP source lives within the System UI accessibility code, and it provides big touch targets for actions such as taking a screenshot, locking the screen, opening Quick Settings and notifications, adjusting volume and brightness, invoking Assistant and triggering system navigation. It is aimed at users with motor or dexterity difficulties. Once enabled from Settings then Accessibility, it is opened with a two-finger upward swipe (or three fingers when TalkBack is on). Note that "Accessibility Menu" is also listed as one of the features of the Android Accessibility Suite (package com.google.android.marvin.talkback), alongside TalkBack, Select to Speak and Switch Access. The same on-screen menu can therefore be associated with more than one package, so the presence of this System UI package alone is not a reliable signal of how a given device provides the feature. For Android Enterprise, EMM and kiosk fleets it is inactive until a user or policy enables the accessibility service. Take care before blocking or removing it: it is an assistive feature that some users rely on, so weigh any accessibility obligations for the deployment before doing so. On a genuinely single-purpose kiosk where assistive input is neither needed nor permitted it may be disabled, but for general-purpose fleets it should normally be left in place.

• Use the Accessibility Menu - Android Accessibility Help →
• Android accessibility overview (Accessibility Suite components) - Android Accessibility Help →
• SystemUI Accessibility Menu source README.md - platform/frameworks/base - Git at Google →

• Signed by Google's own signing key (the same key Google uses across devices), so it is a Google-provided preinstall that updates independently of the system image, though 25 different Google signing keys appear across the fleet. It also signs the Android framework, so it is a platform-level key on its device(s).
• Its largest observed manifest declares 5 permissions: 3 signature or system-level and 2 vendor or uncatalogued. The signature/system share marks it as a privileged component, not an ordinary app.
• Never reported as user-facing, so it runs as a background or system component rather than an app the user opens.