ITS: Adding an error message for aruco markers not found.

An index error occurred during testing when ArUco markers were not found.
An error message has been implemented to prompt testers to check chart alignment.

Bug: 397501946
Test: tested locally
Flag: TEST_ONLY
Change-Id: Iaa3a85eb8a0b7238dfdf2640b157198a76c3795e
2 files changed