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This adds events CLOUDDPS_REQUEST/CLOUDDPS_RESPONSE to app install log.

Bug: b/73277923
Test: manual
Change-Id: I7ec87a7bbfa1bc358feb8a44481c34599012b32e
Reviewed-on: https://chromium-review.googlesource.com/952538Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
Reviewed-by: Greg Kerr <kerrnel@chromium.org>
Reviewed-by: Bartosz Fabianowski <bartfab@chromium.org>
Commit-Queue: Yury Khmel <khmel@google.com>
Cr-Commit-Position: refs/heads/master@{#542937}