Svetoslav Ganov 8643aa0179 Interrogation of the view hierarchy from an AccessibilityService.
1. Views are represented as AccessibilityNodeInfos to AccessibilityServices.

2. An accessibility service receives AccessibilityEvents and can ask
   for its source and gets an AccessibilityNodeInfo which can be used
   to get its parent and children infos and so on.

3. AccessibilityNodeInfo contains some attributes and actions that
   can be performed on the source.

4. AccessibilityService can request the system to preform an action
   on the source of an AccessibilityNodeInfo.

5. ViewAncestor provides an interaction connection to the
   AccessibiltyManagerService and an accessibility service uses
   its connection to the latter to interact with screen content.

6. AccessibilityService can interact ONLY with the focused window
   and all calls are routed through the AccessibilityManagerService
   which imposes security.

7. Hidden APIs on AccessibilityService can find AccessibilityNodeInfos
   based on some criteria. These API go through the AccessibilityManagerServcie
   for security check.

8. Some actions are hidden and are exposes only to eng builds for UI testing.

Change-Id: Ie34fa4219f350eb3f4f6f9f45b24f709bd98783c
2011-06-06 18:46:03 -07:00

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<!-- Copyright (C) 2008 The Android Open Source Project
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<permissions>
<!-- ================================================================== -->
<!-- ================================================================== -->
<!-- ================================================================== -->
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permission names. By specifying such a mapping, you are saying
that any application process granted the given permission will
also be running with the given group ID attached to its process,
so it can perform any filesystem (read, write, execute) operations
allowed for that group. -->
<permission name="android.permission.BLUETOOTH_ADMIN" >
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<permission name="android.permission.BLUETOOTH" >
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<permission name="android.permission.INTERNET" >
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<permission name="android.permission.CAMERA" >
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<permission name="android.permission.READ_LOGS" >
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<permission name="android.permission.WRITE_EXTERNAL_STORAGE" >
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<permission name="android.permission.WRITE_MEDIA_STORAGE" >
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<permission name="android.permission.ACCESS_MTP" >
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<permission name="android.permission.NET_ADMIN" >
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set on the applications that can access /cache -->
<permission name="android.permission.ACCESS_CACHE_FILESYSTEM" >
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installable from the framework. Be careful. -->
<permission name="android.permission.DIAGNOSTIC" >
<group gid="input" />
<group gid="diag" />
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user IDs. These are used to allow specific core system users to
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example, we give a wide variety of permissions to the shell user
since that is the user the adb shell runs under and developers and
others should have a fairly open environment in which to
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<assign-permission name="android.permission.BROADCAST_STICKY" uid="shell" />
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<assign-permission name="android.permission.SET_DEBUG_APP" uid="shell" />
<assign-permission name="android.permission.SET_PROCESS_LIMIT" uid="shell" />
<assign-permission name="android.permission.SET_ALWAYS_FINISH" uid="shell" />
<assign-permission name="android.permission.DUMP" uid="shell" />
<assign-permission name="android.permission.SIGNAL_PERSISTENT_PROCESSES" uid="shell" />
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code to link against. -->
<library name="android.test.runner"
file="/system/framework/android.test.runner.jar" />
<library name="javax.obex"
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