tree 5103c5f87b2ce1af63015e3fe8d20e83c7dc6b74
parent 509d06a6415b9f6a628d3ebac9f7047de8f7d34c
author lumark <lumark@google.com> 1542964296 +0800
committer lumark <lumark@google.com> 1542966651 +0800

Add Null check in AppWindowToken.onDisplayChanged.

Since onDisplayChanged is through DisplayManagerGlobal.sendDisplayEvent
by message, we should check all objects if is null in onDisplayChanged
to prevent message delayed case.

Bug: 119926469
Test: All existing tests passed
Change-Id: Icf5d8b19384ee0a569b6402970a8fc0bca1c882c