Printing to Save as PDF Does Not Use Actual Filename

**Environment:**
- Preview version: all versions including v2.50.0

**Desktop (please complete the following information):**
- OS: all OS versions
- Browser: all browsers
- Version: all browser versions

**Steps to reproduce the problem:**
1. Load any file in previewer component
2. Click the print button and attempt to save as PDF
3. Notice the filename is the browser attempts to save as is not the name of the actual file

**What is the expected behavior? (Screenshots can be helpful here)**
The default filename that the browser should try to save as should be the actual filename

**What went wrong? (Screenshots, console logs, or HAR files can be helpful here)**

Sample screenshot trying to print a pdf and telling the browser to save it as a pdf:

Different viewers print differently but they all have the same problem (ie [document viewer](https://github.com/box/box-content-preview/blob/6ab482eb0a55f3ee967ae730f706dd26618671fe/src/lib/viewers/doc/DocBaseViewer.js#L952) print logic).

Start with the print logic in src/lib/viewers/doc/DocBaseViewer.js, then compare it with the corresponding print paths for the other viewers mentioned in the issue. Reproduce saving a preview as PDF across a browser and viewer, and verify that the browser's suggested filename matches the actual file name.

Written by the indexing model from the issue text.