Do not show animation background with wallpaper transition

Though in real case, it will be remote animation when launching
app from built-in launcher so DefaultTransitionHandler won't be used.

While running test which starts app from shell command, or 3rd party
launcher which uses default animation, the animation may not look
good if a color layer covers on visible wallpaper when opening apps.

Bug: 227736816
Test: adb shell setprop persist.wm.debug.shell_transit 1; reboot
      com.android.server.wm.flicker.launch.OpenAppColdTest

Change-Id: Ibbce257537e2783934375079424e9f877b738a06