Create webrtc/sdk/android folder
Create webrtc/sdk/android folder

BUG=webrtc:5882
NOTRY=True

Review-Url: https://codereview.webrtc.org/2532393004
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#15326}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 998df1d1a0609d0205e8f76093469cd146180c4a

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