Summary: Renames `ReactFiberErrorDialog-test` to `ExceptionsManager-test` and adds tests for `console.error` and exceptions not captured by React. Some of this functionality is covered by the RNTester integration tests, but this JS test suite is both more comprehensive and easier to iterate against.
Reviewed By: cpojer
Differential Revision: D16363166
fbshipit-source-id: 32a4b89bb50131fae86e3c03db7eacbbcf86966b
Moti Zilberman