Build a bridge to control whether the graph is clickable or not

Create a bridge to read phenotype flag from GoogleSettings to control
whether each time slot in the graph is clickable or not.

Bug: 185308803
Test: make SettingsRoboTests
Change-Id: If8b58dcaa50ad5fb6b447ca5b7146639ee31a9df

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

@@ -158,6 +158,11 @@ public class PowerUsageFeatureProviderImpl implements PowerUsageFeatureProvider
         return false;
     }
 
+    @Override
+    public boolean isChartGraphSlotsEnabled(Context context) {
+        return false;
+    }
+
     @Override
     public Map<Long, Map<String, BatteryHistEntry>> getBatteryHistory(Context context) {
         return null;