Update the categorize rule for system and app item bucket

Add a config to control different design concept in the chart 1) put all apps with system UID and system components (e.g. bluetooth, display, wifi ... etc) into the system bucket or 2) separate them into two different bucket (app & system bucket) in the chart UI for better experimental testing

Bug: 202118250
Test: make RunSettingsRoboTests
Change-Id: Id6f7c07d96ad8a365e7405160a5248c57a5a008d

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

@@ -349,12 +349,12 @@ public final class BatteryDiffEntryTest {
     }
 
     @Test
-    public void testIsSystemEntry_uidBatteryWithSystemProcess_returnTrue() {
+    public void testIsSystemEntry_uidBatteryWithSystemProcess_returnFalse() {
         final BatteryDiffEntry entry =
             createBatteryDiffEntry(
                 ConvertUtils.CONSUMER_TYPE_UID_BATTERY,
                 /*uid=*/ 1230, /*isHidden=*/ false);
-        assertThat(entry.isSystemEntry()).isTrue();
+        assertThat(entry.isSystemEntry()).isFalse();
     }
 
     @Test