Remove redundent @VisibleForTesting annotation

There are many methods marked with @VisibleForTesting annotation but
they are overridden or used by child classes. So remove
@VisibleForTesting for readability.

Fixes: 73292660
Test: Rebuild and Robotests
Change-Id: Ie7fe8ac98deb3d050578552982ab523bd1694deb
1 file changed