Fix CastOperand(...) utility function am: 93caac6d55 am: a3c0045c2d

Original change: https://android-review.googlesource.com/c/platform/tools/dexter/+/3005092

Change-Id: I516c828d75e29bdcc18d7abab56af27a99c594d4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>