Wire up QualityScaler for H.264 on Android.
Wire up QualityScaler for H.264 on Android.

BUG=webrtc:4968
R=magjed@webrtc.org, stefan@webrtc.org

Review URL: https://codereview.webrtc.org/1365063002 .

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#10055}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 2bc68c731dd1e643f89d636de4cdb1dc5d63bd40

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