Broadcast Action: An existing application package has been changed (e.g. a component has been enabled or disabled). The data contains the name of the package.

• Intent.ExtraUid containing the integer uid assigned to the package.
• Intent.ExtraChangedComponentNameList containing the class name of the changed components (or the package name itself).
• Intent.ExtraDontKillApp containing boolean field to override the default action of restarting the application.

This is a protected intent that can only be sent by the system.

[Android Documentation]