[non-BE] port fix for float issue 1559

Jan Kienerequested to merge
float-1559-synthesis-saturates-for-stereo-with-dtx-and-bitrate-switching into main

Reason why this change is needed

  • Noise bursts can happen in CNG synthesis after switchign to a higher bandwidth

Description of the change

  • In CNG (re-)configuration, check if a switch is happening to a higher bandwidth. If yes, extend the value of the highest band upwards

Affected operating points

  • Any FD-CNG with unfortunate bandwidth switching.

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