[SDFAB-352][SDFAB-353] Retrieve MeterFeatures from the P4RT southbound, Extend MeterProviderService and revisit MeterStore

Change-Id: If0dae53643988cb551ff5020abd792cb6d33ff6b
diff --git a/drivers/p4runtime/src/main/resources/p4runtime-drivers.xml b/drivers/p4runtime/src/main/resources/p4runtime-drivers.xml
index 0750805..67edaab 100644
--- a/drivers/p4runtime/src/main/resources/p4runtime-drivers.xml
+++ b/drivers/p4runtime/src/main/resources/p4runtime-drivers.xml
@@ -28,9 +28,8 @@
                    impl="org.onosproject.drivers.p4runtime.P4RuntimeFlowRuleProgrammable"/>
         <behaviour api="org.onosproject.net.group.GroupProgrammable"
                    impl="org.onosproject.drivers.p4runtime.P4RuntimeGroupProgrammable"/>
-        <!-- FIXME: re-enable when ONOS-7720 is fixed
         <behaviour api="org.onosproject.net.meter.MeterProgrammable"
-                   impl="org.onosproject.drivers.p4runtime.P4RuntimeMeterProgrammable"/>-->
+                   impl="org.onosproject.drivers.p4runtime.P4RuntimeMeterProgrammable"/>
         <property name="supportPacketRequest">true</property>
     </driver>
 </drivers>