Revert of Don't reinit encoder when rotation changes. (patchset #3 id:40001 of https://codereview.webrtc.org/2853463004/ )

Reason for revert:
Breaks compile on buildbots.

Original issue's description:
> Don't reinit encoder when rotation changes.
>
> TESTED=By rotating phone in AppRTCMobile.
> BUG=webrtc:7535
>
> Review-Url: https://codereview.webrtc.org/2853463004
> Cr-Commit-Position: refs/heads/master@{#17985}
> Committed: https://chromium.googlesource.com/external/webrtc/+/70e39e159eb350cb1acbf81dbe0d84d51c77b664

TBR=magjed@webrtc.org,asapersson@webrtc.org,perkj@webrtc.org,sprang@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7535

Review-Url: https://codereview.webrtc.org/2861633003
Cr-Original-Commit-Position: refs/heads/master@{#17987}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 823e900d2c917e4f110b28a705ca8e2c7b0b0c09
4 files changed