[M120 Migration][WRTjs][VD] Use ps-agent mount for appzone enabled model

[M120 Migration][WRTjs][VD] Use ps-agent mount for appzone enabled model

direct mount's mount_namespace is changed when appzone container
is enabled.
Then, chromium initilization can be failed since mount point's
internal path cannot be accessible.

So, for the enterprise models, it will disable direct mount

Reference:
https://review.tizen.org/gerrit/#/c/platform/framework/web/chromium-efl/+/308292/

Change-Id: I100c872832197578108232020bfe21627e6fe992
Signed-off-by: DongHyun Song <dh81.song@samsung.com>