Move buffer out of rtc_base_approved

Bug: webrtc:9838
Change-Id: I14feff7b1f0182d031b6644d281be44122820ce7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/259307
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Florent Castelli <orphis@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36629}
diff --git a/media/BUILD.gn b/media/BUILD.gn
index 3468569..4f3c8f1 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -79,6 +79,7 @@
     "../modules/audio_processing:audio_processing_statistics",
     "../modules/rtp_rtcp:rtp_rtcp_format",
     "../rtc_base",
+    "../rtc_base:buffer",
     "../rtc_base:checks",
     "../rtc_base:logging",
     "../rtc_base:macromagic",
@@ -294,6 +295,7 @@
     "../modules/video_coding:video_coding_utility",
     "../rtc_base",
     "../rtc_base:audio_format_to_string",
+    "../rtc_base:buffer",
     "../rtc_base:checks",
     "../rtc_base:ignore_wundef",
     "../rtc_base:logging",
@@ -494,6 +496,7 @@
       "../modules/video_coding:video_coding_utility",
       "../p2p:rtc_p2p",
       "../rtc_base",
+      "../rtc_base:buffer",
       "../rtc_base:checks",
       "../rtc_base:gunit_helpers",
       "../rtc_base:macromagic",