GitLab

This CL adds implementation for
TemplateUrlServiceAndroid::SetPlayAPISearchEngine. The function:
- Checks if Play API search engine already exists.
- Adds new search engine marking it with created_from_play_api flag.
- Sets the search engine as DSE if enterprise policy allows.

The logic for merging new search engine with existing prepopulated or
autogenerated is still not implemented.

BUG=1002271
R=pkasting@chromium.org,wylieb@chromium.org

Change-Id: I3065df7218f90fb74cabbd338b37b8286d2450ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1826001Reviewed-by: Kevin Bailey <krb@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Pavel Yatsuk <pavely@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700478}