Enable Unified Consent feature by default.

This CL enables Unified Consent feature by default. It removes a few
earl grey tests that were only used for pre-Unity flows. It also removes
the unified consent test suite as it is no longer relevant and this
significantly reduces the bots build time.

Bug: 960260
Change-Id: Iff7972e3b6533dc8f547562e2aae854b6f6b1833
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1617444
Reviewed-by: Jérôme Lebel <jlebel@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Mihai Sardarescu <msarda@chromium.org>
Cr-Commit-Position: refs/heads/master@{#666201}
9 files changed