Add infra for battery tip

This cl adds the basic structure for battery tip:
1. BaseBatteryTip: Model class to represent the tip and build
preference and dialog
2. SummaryTip: Display a general battery summary(i.e. your battery
is good..)
3. BatteryTipLoader: AsyncLoader to load the battery tips.
4. BatteryTipPreferenceController: preference controller for
preference group to display battery tips

This cl also:
1. Remove the anomaly code in PowerUsageSummary and we will add it
to app restriction in future.
2. Add preference_category_no_title.xml to avoid the extra 32dp
blank at the top.

Bug: 70570352
Test: RunSettingsRoboTests
Change-Id: If91a553888e2eb91d55fb1d0d7bbea69652f144c

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

@@ -339,15 +339,14 @@ public class PowerUsageSummaryTest {
     }
 
     @Test
-    public void testInitAnomalyDetectionIfPossible_detectionEnabled_init() {
+    public void testRestartBatteryTipLoader() {
+        //TODO: add policy logic here when BatteryTipPolicy is implemented
         doReturn(mLoaderManager).when(mFragment).getLoaderManager();
-        doReturn(mAnomalyDetectionPolicy).when(mFragment).getAnomalyDetectionPolicy();
-        when(mAnomalyDetectionPolicy.isAnomalyDetectionEnabled()).thenReturn(true);
 
-        mFragment.restartAnomalyDetectionIfPossible();
+        mFragment.restartBatteryTipLoader();
 
-        verify(mLoaderManager).restartLoader(eq(PowerUsageSummary.ANOMALY_LOADER), eq(Bundle.EMPTY),
-                any());
+        verify(mLoaderManager).restartLoader(eq(PowerUsageSummary.BATTERY_TIP_LOADER),
+                eq(Bundle.EMPTY), any());
     }
 
     @Test