Log the path that caused exception instead of websessions directory

Previously, failures while reading a websession file logged the
websessions directory, which was not helpful for identifying the
offending path.

Log the specific file path that triggered the exception instead, so that
it can be more easily investigated.

Bug: Issue 415076951
Change-Id: I4c292f0f9a5c42af617afdff67409f966c83e83c
1 file changed