Updates DEPS of components/filesystem/public/cpp/prefs
Updates DEPS of components/filesystem/public/cpp/prefs

so that it depends upon the filesystem service. This way anyone
depending upon the filesystem client lib doesn't need a data_dep on
the filesystem service. We do the same thing for mus

BUG=none
TEST=none
R=erg@chromium.org

Review URL: https://codereview.chromium.org/1659673002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#372831}

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