tree 5b8e121ca27927a5fbf8b8bde6b464efeb1c97d7
parent e31009b776951f9816f004a568c806fce3828619
author Unsuk Jung <unsuk@google.com> 1458032801 -0700
committer Unsuk Jung <unsuk@google.com> 1458107036 +0000

CDD: SD card encryption required for the primary external storage
Section: 9.5. Multi-User Support

The CDD language made sense until Android 4.3, where the only
"external storage APIs" were for the primary external storage.

However with Android 4.4 the definition of external storage APIs
became ambiguous as apps gained write access to app-specific
directories on secondary external storage devices.

The AOSP implementation of these APIs offers write access to the
secondary external storage only to the owner user, so it is worth
it to clarify that the encryption of the removable storage media
for Multi-User support is only required if the removable storage media
is used as the primary external (a.k.a. application shared) storage.

Bug: 22699648
Change-Id: Ie8568272eec05392998bcfe398e82ae9347fcb9c