Framework: Add Advanced reboot (2 of 2)

This commit responds to a setting in Development settings for including
options in the power menu for rebooting into recovery or bootloader. It
is defauled to off.

When enabled, the Advanced reboot options will only be available once the
device is unlocked.

Change-Id: I675f31de1f82c344c7923e953fd4a6e26dd036da
Fix reboot window texts

PS2: move assignment of titleResourceId into the condition and
only query longPressBehavior when it's needed.

Change-Id: I00c3940c2b5472434177e94ab7c72d5fecc61b2e
Framework: Show the Advanced reboot menu only for the primary user

Change-Id: I73f82eade26f268e2b4608fa23cabcf0bb8fc862