Adds `get_info` to `PyEnvironmentMock` in order to support unit tests in which `get_info` is called.
Adds `get_info` to `PyEnvironmentMock` in order to support unit tests in which `get_info` is called.

PiperOrigin-RevId: 363426568
Change-Id: Ibbcf9c29cf03252816b549bc4ff04f8021f1ca57

tensorflow/agents,tensorflow/agents