powerstats: sort frequencies in descending order

Cpufreq data is sorted in ascending order, but power stats
are sorted in descending order. Reverse sorting to maintain
consistency with other power stats.

Bug: 317429309
Test: vts-tradefed run vts -m VtsHalPowerStatsTargetTest
Change-Id: I29a58c02add846eb66a8d6eb247336111363c335
Signed-off-by: Darren Hsu <darrenhsu@google.com>

powerstats/AdaptiveDvfsStateResidencyDataProvider.cpp

@@ -62,6 +62,14 @@ AdaptiveDvfsStateResidencyDataProvider::AdaptiveDvfsStateResidencyDataProvider(
             }
         }
 
+        // Cpufreq data is sorted in ascending order, but power stats are sorted
+        // in descending order. Reverse sorting to maintain consistency with
+        // other power stats.
+        if (states.size() > 1 &&
+                std::atoll(states[0].second.c_str()) < std::atoll(states[1].second.c_str())) {
+            std::reverse(states.begin(), states.end());
+        }
+
         mPowerEntities.push_back({powerEntities[i].first, std::move(states)});
     }