Reproduction

Steps to reproduce:

1. provide MAT_DIALOG_DEFAULT_OPTIONS in the module
2. provide useValue. (ex. disableClose: true - see the following code)
   {
   provide: MAT_DIALOG_DEFAULT_OPTIONS,
   useValue: {
   disableClose: true,
   },
   },

Expected Behavior

What behavior were you expecting to see?

Configs should be set along with the default values for the other options. Such behaviour can be seen when provided in the component with dialog.open() method

Actual Behavior

What behavior did you actually see?

Given configs overwrite the Configs value, so that default options are also overwritten.

Environment

• Angular:
• CDK/Material:
• Browser(s):
• Operating System (e.g. Windows, macOS, Ubuntu):