tree 237672327596bc1f3ac673f781fb892f94ec987d
parent adb9fcde8514d28c9ea5e5ac988d477a77b895c8
author Winson Chung <winsonc@google.com> 1490372417 -0700
committer Winson Chung <winsonc@google.com> 1490372417 -0700

Prevent cleaning up and resuming null activity when task is reparented.

- If reparenting a task with no running activities, ensure that we don't
  try to clean up the null activity record from the stack.  In addition,
  once the task is reparented, skip the attempt to front if the activity
  is null.

Bug: 36508639
Test: android.server.cts.ActivityManagerPinnedStackTests
Change-Id: I58d4d600523ac263d0be1ee8d09cfc4d94bef664