NetEq: New test for muted state during CNG
NetEq: New test for muted state during CNG

Verifies that NetEq doesn't enter muted state when CNG mode is active
and the packet stream is suspended for a long time.

BUG=webrtc:5608

Review-Url: https://codereview.webrtc.org/2335343011
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#14308}

TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc