Fix the following issues with fuzz targets when built on Windows:
1. Fix audio_processing_fuzzer by making types match in
invocations of CheckedDivExact by explicitly casting to size_t.
2. Fix packet_buffer_fuzzer by including "frame_object.h" for
declaration of RtpFrameObject.
3. Fix rtcp_receiver_fuzzer by including "tmmb_item.h" for declaration
of TmmbItem.
Bug: chromium:891867
Change-Id: Iddc338360ca37d5fc31488ec908eb4cdb5cc7b94
Reviewed-on: https://webrtc-review.googlesource.com/c/103844
Commit-Queue: Jonathan Metzman <metzman@chromium.org>
Reviewed-by: Alex Loiko <aleloi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25028}
9f80b97309