Relanding Add i18n support for Android App Restrictions.

Reason for revert:
Changing the first output of grd file caused build to fail due to a bad depfile. Now depfile depends on a stampfile instead of first output.
Hence this also adds an additional grit roll from r187 to r188.

Effective grit roll from r186:r188

188: Allow depending on stamp for grit files.
187: Add a Policy template writer that generates Android resources which can be exposed through Android's App Restriction Schema.

Original issue's description:
> Revert of Add i18n support for Android App Restrictions. (patchset #7 id:120001 of https://codereview.chromium.org/865573002/)
>
> Reason for revert:
> Broke some GN builds, e.g.:
>
> http://build.chromium.org/p/chromium.linux/builders/Linux%20GN/builds/24483/steps/compile/logs/stdio
> http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20GN/builds/11092/steps/compile/logs/stdio
>
> ninja: Entering directory `/mnt/data/b/build/slave/Linux_GN/build/src/out/Release'
> ninja:error: expected depfile 'gen/chrome/policy_templates.d' to mention 'gen/chrome/app/policy/common/html/am/chrome_policy_list.html', got 'gen/chrome/app/policy/linux/examples/chrome.json'
>
>
> Committed: https://crrev.com/27ee0fa9afe9cb97016e532bd0cecd1b011251b9
> Cr-Commit-Position: refs/heads/master@{#319773}

BUG=450548

Review URL: https://codereview.chromium.org/997523002

Cr-Commit-Position: refs/heads/master@{#322366}
7 files changed