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

Change-Id: I083df67ae5cf0513d82d0ccf00c790d2bb000ef4
diff --git a/core/api/src/main/java/org/onosproject/net/meter/MeterProgrammable.java b/core/api/src/main/java/org/onosproject/net/meter/MeterProgrammable.java
index 4b8ea07..74eab4d 100644
--- a/core/api/src/main/java/org/onosproject/net/meter/MeterProgrammable.java
+++ b/core/api/src/main/java/org/onosproject/net/meter/MeterProgrammable.java
@@ -42,4 +42,11 @@
      * @return completable future with the collection of meters
      */
     CompletableFuture<Collection<Meter>> getMeters();
+
+    /**
+     * Queries the meter features from the device.
+     *
+     * @return completable future with the collection of meter features
+     */
+    CompletableFuture<Collection<MeterFeatures>> getMeterFeatures();
 }
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