[rdkb][common][app][Fix rdk-wanmanager crash]

[Description]
Fix rdk-wanmanager crash
1. enable rdk-vlanmanager, because of rdk-wanmanager depend on rdk-vlanmanager now
2. remove FEATURE_802_1P_COS_MARKING flag , it caused wanmanager crash.

[Release-log]

diff --git a/recipes-ccsp/ccsp/ccsp-common-library.bbappend b/recipes-ccsp/ccsp/ccsp-common-library.bbappend
index e84f6c5..b6d00ec 100644
--- a/recipes-ccsp/ccsp/ccsp-common-library.bbappend
+++ b/recipes-ccsp/ccsp/ccsp-common-library.bbappend
@@ -162,7 +162,7 @@
 SYSTEMD_SERVICE_${PN} += "ProcessResetDetect.path"
 SYSTEMD_SERVICE_${PN} += "ProcessResetDetect.service"
 SYSTEMD_SERVICE_${PN} += "rfc.service"
-SYSTEMD_SERVICE_${PN} += "${@bb.utils.contains('DISTRO_FEATURES', 'rdkb_wan_manager', 'RdkWanManager.service utopia.service ', '', d)}"
+SYSTEMD_SERVICE_${PN} += "${@bb.utils.contains('DISTRO_FEATURES', 'rdkb_wan_manager', 'RdkWanManager.service utopia.service RdkVlanManager.service ', '', d)}"
 SYSTEMD_SERVICE_${PN} += "${@bb.utils.contains('DISTRO_FEATURES', 'fwupgrade_manager', 'RdkFwUpgradeManager.service ', '', d)}"
 
 FILES_${PN}_append = " \