Send fake data if there is no battey consumption entry list

Sends fake data into SettingsIntelligence if there is no data in the
battery consumption list, otherwise we don't have battery level data to
draw into the chart graph. We should draw the battery levels if it is
full-charged without any BatteryEntry data.

Bug: 184807417
Test: make SettingsRoboTests
Test: make SettingsGoogleRoboTests
Change-Id: I759e769256f4aa0ec152afff5c265ee3d04c03da

tests/robotests/src/com/android/settings/fuelgauge/ConvertUtilsTest.java

@@ -111,6 +111,29 @@ public final class ConvertUtilsTest {
             .isEqualTo(BatteryManager.BATTERY_HEALTH_COLD);
     }
 
+    @Test
+    public void testConvert_nullBatteryEntry_returnsExpectedContentValues() {
+        final ContentValues values =
+            ConvertUtils.convert(
+                /*entry=*/ null,
+                /*batteryUsageStats=*/ null,
+                /*batteryLevel=*/ 12,
+                /*batteryStatus=*/ BatteryManager.BATTERY_STATUS_FULL,
+                /*batteryHealth=*/ BatteryManager.BATTERY_HEALTH_COLD,
+                /*timestamp=*/ 10001L);
+
+        assertThat(values.getAsLong("timestamp")).isEqualTo(10001L);
+        assertThat(values.getAsString("zoneId"))
+            .isEqualTo(TimeZone.getDefault().getID());
+        assertThat(values.getAsInteger("batteryLevel")).isEqualTo(12);
+        assertThat(values.getAsInteger("batteryStatus"))
+            .isEqualTo(BatteryManager.BATTERY_STATUS_FULL);
+        assertThat(values.getAsInteger("batteryHealth"))
+            .isEqualTo(BatteryManager.BATTERY_HEALTH_COLD);
+        assertThat(values.getAsString("packageName"))
+            .isEqualTo(ConvertUtils.FAKE_PACKAGE_NAME);
+    }
+
     @Test
     public void testGetDrainType_returnsExpetcedResult() {
         final int expectedType = 3;