Update add resizetasks to work in update

Old should_flash_in_userspace doesn't work if $ANDROID_PRODUCT_OUT is
not set. Also adding in a check to see if resizetasks were added
correctly

Test: fastboot update update.zip without $ANDROID_PRODUCT_OUT and
removing the flashsuperlayout code.
Bug: 283330320

Change-Id: Ib72f6a1cf07745daf70fffae3d1a6b8352e3f79c