Many permissions are designated as
which indicates that
there's no great risk to the user's privacy or security in letting apps have
those permissions. For example, users would reasonably want to know whether
an app can read their contact information, so users have to grant this
permission explicitly. By contrast, there's no great risk in allowing an app
to vibrate the device, so that permission is designated as normal.
If an app declares in its manifest that it needs a normal permission, the system automatically grants the app that permission at install time. The system does not prompt the user to grant normal permissions, and users cannot revoke these permissions.
As of API level 23, the following permissions are classified as