Fix to "Removing AudioMixerStatusReceiver and ParticipantStatistics"
Fix to "Removing AudioMixerStatusReceiver and ParticipantStatistics"

In https://codereview.webrtc.org/1216133004/
level_indicator.h/cc should be removed from GN as well, which was forgotten.

BUG=webrtc:497
TBR=andrew@webrtc.org

Review URL: https://codereview.webrtc.org/1252993003 .

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#9648}

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