Fix testLandscapeSeascapeRotationByApp failure

The test was failed because the DC will have mWaitingForConfig flag set
to true when updateOrientationFromAppTokens called. However, as this is
a test for AppWindowToken, we will not send a new config to the DC. This
flag will remain true and prevent handleResizingWindows handle the
WindowState correctly.

Set the flag to false to fix it.

Test: atest AppWindowTokenTests
Bug: 68267650
Bug: 124088319
Change-Id: I97cf5aa82d0a955e3422fa99523ec405d8e72693