Update file summary for phpdoc

This change follows up Ic5037deda745761e71b4c7f6872ffceb36facfbe and
I3ffbdccf4c4efee38b780872e57526b86f8361b0.
Added file summary to avoid errors in phpdoc.

Bug: 66086
Change-Id: I56a4c35b1a6b14ff58c8ce2e7fdeb6747289dfb0