This is a reland of 6bfad33fd866e682c871c2ef2172b70b609593d1
Original change's description:
> Remove placeholder Obj-C headers and use angle-bracketed headers.
>
> sdk/objc/Framework/Headers are just a placeholder headers
> for backward compatibility and I don't think it is really need this for now.
> Instead, we can generate the framework header in
> ios/mac_framework_bundle_with_umbrella_header.
> Also clang supports the -Wquoted-include-in-framework-header warning,
> and in Xcode 12, it's in Xcode's recommended settings. This warnings
> can be avoided by replacing double-quoted includes with angle-bracketed
> includes when generate framework headers.
>
> No-Presubmit: True
> Bug: webrtc:9627, webrtc:11984
> Change-Id: I3f6258dfa77a5acee669614005b2747feee35e39
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/185920
> Commit-Queue: Anders Carlsson <andersc@webrtc.org>
> Reviewed-by: Anders Carlsson <andersc@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#32343}
TBR=tommi@webrtc.org, andersc@webrtc.org
No-Presubmit: True
Bug: webrtc:9627
Bug: webrtc:11984
Change-Id: I8f44232f1a70b8ff2ce6a4b4792f0a18472fcec3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/187280
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32429}
37d41eea04