am af78591c: am 2c3c5c15: Merge "mount sdcard only on demand; fix sideload installs" into gingerbread

Merge commit 'af78591c9a2aa8379c2d8528c31ea1eb813f6cae'

* commit 'af78591c9a2aa8379c2d8528c31ea1eb813f6cae':
  mount sdcard only on demand; fix sideload installs