IVGCVSW-4794 Change ArmNN counters to report delta values

Signed-off-by: Finn Williams <Finn.Williams@arm.com>
Change-Id: I7957ee41fd700ee502cc14aa313a60664d4caec9
diff --git a/src/profiling/ICounterValues.hpp b/src/profiling/ICounterValues.hpp
index cef0266..09c26b6 100644
--- a/src/profiling/ICounterValues.hpp
+++ b/src/profiling/ICounterValues.hpp
@@ -20,7 +20,8 @@
 
     virtual bool IsCounterRegistered(uint16_t counterUid) const = 0;
     virtual uint16_t GetCounterCount() const = 0;
-    virtual uint32_t GetCounterValue(uint16_t counterUid) const = 0;
+    virtual uint32_t GetAbsoluteCounterValue(uint16_t counterUid) const = 0;
+    virtual uint32_t GetDeltaCounterValue(uint16_t counterUid) = 0;
 };
 
 class IWriteCounterValues