hschlueter 1e8f6ad8e2 Move bitmap helpers to new BitmapTestUtil class.
These helpers will also be useful for future frame processor tests
outside FrameEditorDataProcessingTest.

PiperOrigin-RevId: 430409172
2022-02-23 16:24:30 +00:00
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2022-02-22 17:17:52 +00:00