cast: Add //ui/display/manager dep for EXO

Cast implementation of WMHelper depends on display manager. When
building with EXO enabled GN check fails without this dependency.

Test: gn gen out/cast --check
Bug: 896710
Change-Id: Idc647aedfb5697944019f97c08dd1938f33487dc
Reviewed-on: https://chromium-review.googlesource.com/c/1363951
Reviewed-by: Michael Spang <spang@chromium.org>
Commit-Queue: Daniel Nicoara <dnicoara@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614123}
1 file changed