READ_EXTERNAL_STORAGE: Allows an application to read from external storage.
READ_PHONE_STATE: Allows read only access to phone state, including the phone number of the device, current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.
WRITE_EXTERNAL_STORAGE: Allows an application to write to external storage.
Other permissions
ACCESS_NETWORK_STATE: Allows applications to access information about networks.
ACCESS_WIFI_STATE: Allows applications to access information about Wi-Fi networks.
GET_TASKS: This constant was deprecated in API level 21. No longer enforced.
INTERNET: Allows applications to open network sockets.
SYSTEM_ALERT_WINDOW: Allows an app to create windows using the type TYPE_SYSTEM_ALERT, shown on top of all other apps. Very few apps should use this permission; these windows are intended for system-level interaction with the user.
