Add unit tests for TurbulenceNoiseShader setters

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Original Change: ag/35462529 (Note tests are based on the original CL but may add coverage beyond the specific changes to improve overall code health)

Test: ATP tests passed http://go/forrest-run/L11000030017818566
Bug: 431235865
Flag: TEST_ONLY



Change-Id: I293a031eaafe9622fc394ba834d419b56a041836