Annotation-data exceptions during e.g. printing

[Snuffleupagus]

Attach (recommended) or Link to PDF file here: 160F-2019.pdf from the test-suite.

Configuration:

• Web browser and its version: N/A
• Operating system and its version: N/A
• PDF.js version: Any version after PR [JS] Fix few bugs present in the pdf for issue #14862 #14869
• Is a browser extension: N/A

Steps to reproduce the problem:

1. Open the document
2. Click on the "Réinitialiser"-button, in the document
3. Trigger printing

What is the expected behavior? (add screenshot)
Printing works correctly.

What went wrong? (add screenshot)
Printing ignores any annotation-data, with the following console output:

Warning: getOperatorList - ignoring annotation data during "GetOperatorList: page 0" task: "TypeError: value.trim is not a function". [pdf.worker.js:1111:13](https://mozilla.github.io/pdf.js/build/pdf.worker.js)
Warning: addOpList - ignoring invalid "opList" parameter.

The error originates at line

pdf.js/src/core/annotation.js

Line 1535 in 72943ae

value = value.trim();

and is (as far as I can tell) caused by the formattedValue no longer being a string.

/cc @calixteman