Don't animate black background on cold launch from launcher

When animating cold start from launcher we can't compute the
progress in SurfaceControlWithBackground#calculateBgCrop() via
tracking status bar insets. This CL won't animate bg crop
in case the progress does not make sense.

Bug: 64598822
Test: Cold launch letterboxed app from launcher.
Change-Id: I82182a3c46dd4f81bcf056d1163f78c450bd9b83