This MR adds tests that examine the values of the samples output by the byte stream handlers.
It is marked as draft as it is dependent on the fixes included within MR !7569.
I've also renamed the tests as they previously exclusively tested the sample output timestamps. The tests now also look at the number of buffers included in a sample and total size of the buffers within a sample.
-- v4: mfplat/tests: Add tests for MP3 Byte Stream Output. mfplat/tests: Add tests for Byte Stream Output.