Add deprecated mark to "GetDeviceCapability"

Add deprecated mark to "GetDeviceCapability"

[Issue#]     LINUXWRT-1020
[Problem]    GlobalDAO has unnecessary API.
[Cause]      N/A
[Solution]   Add deprecated mark to "GetDeviceCapability"
             - FeatureDAOReadOnly::GetDeviceCapability should be used instead of
               GlobalDAOReadOnly::GetDeviceCapability. As GlobalDAOReadyonly
               also doesn't export any APIs, add deprecated mark to construct.

[Verification] Build repos.
[SCMRequest] Depends on https://review.tizendev.org/gerrit/#/c/93615/

Change-Id: I95de4eb2fa1478ea207d9d9089b5c92d8979ff83