Delete temporary accessors in RtpDepacketizer::ParsedPayload
Delete temporary accessors in RtpDepacketizer::ParsedPayload

Bug: webrtc:10397
Change-Id: I86f4623b12e2a92ca541c0c22680fa6ab1ea7f44
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/152665
Reviewed-by: Niels Moller <0057859e47d61d90529d0f66d9ef692cefedb46a@webrtc.org>
Commit-Queue: Danil Chapovalov <55de8d9c2b5977da2dd48f967f21f9d606b172a5@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#29166}

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