bootcontrol: Reduce the number of writes in the set active slot function am: 2a276b35e0
am: 9ab0a61ad0

Change-Id: Ie0afcf6e32b27ae86fa37e1c8d9cf0673e1723af
tree: 8a830a985bec3d2ecdb0dad6ccd7ed1fa13d34d9
  1. Android.mk
  2. boot_control.cpp
  3. NOTICE