tree 35d575855e4c528833f78ed3d0ddaff2660bea3e
parent 0ca1e98fdf300ddbbccbfce26bba5947109597f1
author Dianne Hackborn <hackbod@google.com> 1438647286 -0700
committer Dianne Hackborn <hackbod@google.com> 1438648418 -0700

Fix issue #22860466: viapi security bug - rubber stamping in nested VIs

Add new Activity.isVoiceInteractionRoot() API that an activity can use
to determine whether it is the root activity of a voice interaction
session started by the user's designated voice interaction service.

This is a special new API that apps must explicitly check, because as
with visual activities the model behind an activity should usually be
that it accomplishes its task by interacting with the user (implicitly
getting their approval) rather than trusting that whoever invoked it
is telling it to do what the user once.  In the voice world, however,
there are some cases where quick interactions want to allow for immediate
execution without further user involvement, so this API allows for that
without opening up security holes from other applications.

Change-Id: Ie02d2458f16cb0b12af825641bcf8beaf086931b