Add logging of supported video codecs.
Add logging of supported video codecs.

In particular, logs which codecs are supported by the hardware encoder
factory separately.

BUG=
R=danilchap@webrtc.org

Review URL: https://codereview.webrtc.org/1917713002 .

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#12488}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: e6cd03df9436bf3aa9c1d9b17cda8679377f6fc2

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