squashed commit of the following:
commit e2c2d1c09475ce2e319b935fb5627c82a7693a9b
Author: Guang Zhu <guangzhu@google.com>
Date: Mon Apr 20 13:33:08 2009 -0700
modify wait mechanism so that it checks whether activity has already finished or not first
This reverts commit deb6e8792dd563916724bbc127a6fe16ffe81647.
commit deb6e8792dd563916724bbc127a6fe16ffe81647
Author: Guang Zhu <guangzhu@google.com>
Date: Mon Apr 20 10:58:52 2009 -0700
changed callback mechanism in TestShellActivity to use condition
20b4935f2a