framework: Add reboot menu and reboot options

This is a collection of changes from several people, forward
ported to gingerbread.

Steve Kondik <shade@chemlab.org>
Adds a reboot option to the power menu.

Eddie Ringle <eddie@eringle.net>
Froyo's ShutdownThread wants a reboot reason (we use null to just reboot)

Eddie Ringle <eddie@eringle.net>
Add Reboot string for phone options dialog

Diogo Ferreira <diogo@underdev.org>
Add recovery and bootloader popup options to reboot dialog.

Steve Kondik <shade@chemlab.org>
Add strings for reboot option on power menu.

Eddie Ringle <eddie.ringle@gmail.com>
Use the reboot strings during a reboot