Update i2s_stream.h - C++ / Arduino / Platformio compatibility (AUD-599)

[stasartcode]

I2S_STREAM_CFG_DEFAULT() // FIXME OK -> C++ / Arduino / Platformio -> a value of type "int" cannot be used to initialize an entity of type "i2s_mode_t" // -> change in .platformio\packages\framework-arduinoespressif32\tools\sdk\include\driver\driver\i2s.h - i2s_mode_t - I2S_MODE_MASTER_TX_RX = 13, // FIXME OK -> C++ / Arduino / Platformio -> non-trivial-designated-initializers-not-supported -> the order of initialization needs to be in the exact order of declaration.

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[Alvin1Zhang]

@stasartcode Thanks for the contribution.