Update the ALERT.java per ATOF experts' request

[Sangbaek]

RG-L experts want to replace ATOF time histograms from ATOF::tdc with ATOF::hits for src/main/java/org/jlab/clas/timeline/histograms/ALERT.java

Decoded files are available at /volatile/clas12/rg-l/production/calib_ATOF_081225/calib/recon/