CCA: Rebuild FFmpeg with file protocol support

Currently only pipe protocol is built. The file protocol is needed for
the non-fragmented mp4 recording.

NOPRESUBMIT=true

Bug: 1140852
Test: Pass camera.CCAUIRecordVideo
Change-Id: I31fcb9e45a1487f3acb8db13bd242ae51affdf88
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2507131
Commit-Queue: Shik Chen <shik@chromium.org>
Auto-Submit: Shik Chen <shik@chromium.org>
Reviewed-by: Wei Lee <wtlee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822527}

chromeos/components/camera_app_ui/resources/js/lib/build_ffmpeg.sh

@@ -49,6 +49,7 @@ do_configure() {
     --enable-avformat
     --enable-ffmpeg
     --enable-swresample
+    --enable-protocol=file
     --enable-protocol=pipe
     --enable-demuxer=matroska
     --enable-muxer=mov