Make api/video:encoded_image public.
Make api/video:encoded_image public.

Bug: webrtc:9378
Change-Id: I2cff5e1463f40af11fc011a41ecdddf3c763c4b8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/146601
Reviewed-by: Bjorn Mellem <fbd9b9fcff27ba9e617a0b2d416d05a7dfd43a01@webrtc.org>
Commit-Queue: Mirko Bonadei <d2c43c210eae6feef04f53bae50885e8152edcca@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#28645}

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