Avoid holding lock while calling stream_resetter_ in MaxPaddingSetTest
Avoid holding lock while calling stream_resetter_ in MaxPaddingSetTest

BUG=webrtc:7330

Review-Url: https://codereview.webrtc.org/2745083002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#17207}

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