Remove ListValue::Append(raw ptr) on Android

ListValue::Append(raw ptr) is deprecated and the unique_ptr version should be
used instead. This CL achieves that on Android specifically.

BUG=581865

Review-Url: https://codereview.chromium.org/2811253004
Cr-Commit-Position: refs/heads/master@{#464865}
9 files changed