Merge "apf: Add counters for dropped / passed packets" into pi-dev

am: d11d7ff8a0

Change-Id: Iaec1efa4e827eac986049ddbb440e2a4824a673b

services/net/java/android/net/apf/ApfCapabilities.java

@@ -49,4 +49,14 @@ public class ApfCapabilities {
         return String.format("%s{version: %d, maxSize: %d, format: %d}", getClass().getSimpleName(),
                 apfVersionSupported, maximumApfProgramSize, apfPacketFormat);
     }
+
+    /**
+     * Returns true if the APF interpreter advertises support for the data buffer access opcodes
+     * LDDW and STDW.
+     *
+     * Full LDDW and STDW support is present from APFv4 on.
+     */
+    public boolean hasDataAccess() {
+        return apfVersionSupported >= 4;
+    }
 }