e2e tests for FilterExample on RN-Tester

[joevilches]

Summary: tsia really, added tests for blur, brightness, and chained brightness + blur. I don't really think I need to add them all, as e2e tests can be flaky and I doubt someone changes specific color matrix values ever.

Differential Revision: D57127765

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D57127765

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D57127765

[facebook-github-bot]

This pull request has been merged in facebook/react-native@5f0361a704a81e2bf644a7e26fb3f0314a5d1b07.

[github-actions[bot]]

This pull request was successfully merged by @joevilches in 5f0361a704a81e2bf644a7e26fb3f0314a5d1b07.

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