[Battery usage U] Add an item "Others" in the app list to group small usage apps. This will make the total percetage 100%, which is easy to understand for users.

Bug: 258124173
Fix: 258124173
Test: manual
Change-Id: I5965eeb73a2071c4a9994655e4ed24ec3adf64e8

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

@@ -152,6 +152,11 @@ public class PowerUsageFeatureProviderImpl implements PowerUsageFeatureProvider
         return true;
     }
 
+    @Override
+    public Set<Integer> getOthersSystemComponentSet(Context context) {
+        return new ArraySet<>();
+    }
+
     @Override
     public Set<Integer> getHideSystemComponentSet(Context context) {
         return new ArraySet<>();