Add aggregated partial wakelock time per uid

Bug: 38198272
Test: none
Change-Id: I6da292a4d11a9cedce17e552fb4809c8815782f2

src/com/android/settings/fuelgauge/FakeUid.java

@@ -44,6 +44,11 @@ public class FakeUid extends Uid {
         return null;
     }
 
+    @Override
+    public Timer getAggregatedPartialWakelockTimer() {
+        return null;
+    }
+
     @Override
     public ArrayMap<String, ? extends Timer> getSyncStats() {
         return null;