GN: Fix Chromium breakage for remote_bitrate_estimator

In https://codereview.webrtc.org/2040313004 a config was changed
incorrectly and a dependency on rtc_base_approved is also missing.

BUG=webrtc:5949
TBR=stefan@webrtc.org

Review URL: https://codereview.webrtc.org/2044333004 .

Cr-Original-Commit-Position: refs/heads/master@{#13088}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: d4070c63d9e573cf134547eded96f2babd034d4e
1 file changed