Progress spinner breaks on older browsers

[mayankku]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

Progress spinner should work on all possible browsers.

What is the current behavior?

Progress spinner throws exceptions on relatively recent browsers, e.g. Firefox < 55.
This is due to omitting a previously required parameter in the call to insertRule.

What are the steps to reproduce?

Run progress spinner sample on Firefox < 55.

What is the use-case or motivation for changing an existing behavior?

No change in behavior

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Firefox < 55, possibly Chrome < 60

[crisbeto]

Will be fixed by #7810.

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