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This is a reland of d20781e1

The cl was reverted due to an internal dependency issue, which has been resolved. So TBR for the reland.
TBR=sammc@chromium.com, xiaohuic@chromium.com

Original change's description:
> Handle Open/Verify android apps for Assistant
>
> Bug: b/117793081
> Test: Manual Test
> Change-Id: If747d3317cb163715ff907839203e0c0eee57a1c
> Reviewed-on: https://chromium-review.googlesource.com/c/1352341
> Commit-Queue: Yue Li <updowndota@chromium.org>
> Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
> Reviewed-by: Sam McNally <sammc@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#612448}

Bug: b/117793081
Change-Id: I19268f1ad40deb7b77f68bb0f9a87e98154d55b9
Reviewed-on: https://chromium-review.googlesource.com/c/1356326Reviewed-by: Yue Li <updowndota@chromium.org>
Commit-Queue: Yue Li <updowndota@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612861}