[Eche] Update histogram ownership and expiry

Moving primary ownership to Cross Device team while keeping exo-core@ as
secondary in order to be able to respond to alerts quicker and prevent
histograms from expiring.

Additionally updated the expiration.

Test: N/a, metadata change
Change-Id: I6a5331e7f75104d09db451d455c6806a45c4bd68
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4818070
Auto-Submit: Crisrael Lucero <crisrael@google.com>
Reviewed-by: Pu Shi <pushi@google.com>
Commit-Queue: Pu Shi <pushi@google.com>
Cr-Commit-Position: refs/heads/main@{#1189128}