docs: migrate another piece of the html android build instructions
docs: migrate another piece of the html android build instructions

This patch adds the text until the "Plug in your Android device"
section.

BUG=None
TEST=None
R=newt@chromium.org,dpranke@chromium.org

Review URL: https://codereview.chromium.org/1864543005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#385768}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk