Fix VtsKernelCheckpointDTFstabTest

This fixes the incorrect usage of asserts occurs in the if(target_file_utils.Exists(dt)) path

Bug: b/138097599
Test: vts-tradefed run vts -m VtsKernelCheckpointDTFstabTest -a arm64-v8a
Change-Id: I6eeb64fb42186b07898e5e85120a53a28fa9f358
Merged-In: I6eeb64fb42186b07898e5e85120a53a28fa9f358
1 file changed