dualboot: add truedualboot support

Change-Id: I33dec96da48700307550be05807a6b78d5e8b08c

Conflicts:
	Android.mk
dualboot: add menu item under advanced to set bootmode
- also refresh dualboot entries everytime before calling 'get_filtered_menu_selection'
  to sync changes

Change-Id: I717cef001733d5edf1edea73ecc724edb1fd3fa2
dualboot: handle 'format_device'

Change-Id: I674608c2402f618502dee75148eb13b8836bb3e9
Version 6.0.4.8

Change-Id: I05cc1417f906cf2d3696bee457f4b095ee201a85