Packages that do not use android.permission.BACKUP_DATA will neither be backed
up nor restored. That permission is currently signature-only. In the future if
access to the backup/restore infrastructure is made available to arbitrary 3rd
party applications, the permission checks (and indeed, the permission itself)
can simply be removed.
This backs up the basic system and secure settings. THe restoration doesn't
take effect immediately. You many need to restart the runtime to see all
restored values take effect.
made public, and wouldn't be used by any third party applications,
and no longer does anything regardless).
Also remove the WRITE_GSERVICES permission from the SettingsProvider
package's manifest (the declaration there was redundant with the one
in the core manifest, where all the other settings-related permissions
live -- no other core package includes its own permission definitions).
