Fix a crash in PeerConnectionFactory.SetVideoHwAccelerationOptions.
Fix a crash in PeerConnectionFactory.SetVideoHwAccelerationOptions.

BUG=webrtc:8035

Review-Url: https://codereview.webrtc.org/2992523002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#19171}

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