If you visit the license section of a Google font[0], you will find text such as:
These fonts are licensed under the Apache License, Version 2.0.
You can use them freely in your products & projects - print or digital, commercial or otherwise.
This isn't legal advice, please consider consulting a lawyer and see the full license for all details.
With, in this case, a link to the Apache License v2.[1]
However this text is purely informational. The licence file included with downloaded fonts is simply a copy of the text at [1], which includes instructions on how to correctly apply the license, including the boilerplate "Copyright [yyyy] [name of copyright owner]".
Fonts under other licenses are similarly affected. What gives?
[0] https://fonts.google.com/specimen/Roboto#license [1] https://www.apache.org/licenses/LICENSE-2.0
With the inclusion of the verbage that they are licensed as apache 2.0 a freely usable, that generally shows intent of Google on how they are to be licensed regardless of if they are using a boiler plate or not.
As they say consult a lawyer. Because if there is any kind of dispute it's the lawyer who would be defending against that dispute and so they would make the judgment of how defensible the position is. At the end of the day regardless of how clear a license agreement is when the lawyers come knocking you better have deep pockets.