Move anomaly code to BatteryTipUtils

Then we could reuse it across settings.

Bug: 74529048
Test: robo test that cover each components still pass
Change-Id: Ied0bbc6e6a1dca9628c2c084c3284ffab2f85160

tests/robotests/src/com/android/settings/fuelgauge/batterytip/detectors/RestrictAppDetectorTest.java

@@ -93,6 +93,7 @@ public class RestrictAppDetectorTest {
                 AppOpsManager.OP_RUN_ANY_IN_BACKGROUND, UNRESTRICTED_UID,
                 UNRESTRICTED_PACKAGE_NAME);
 
+        BatteryDatabaseManager.setUpForTest(mBatteryDatabaseManager);
         doReturn(mPackageManager).when(mContext).getPackageManager();
         doReturn(mApplicationInfo).when(mPackageManager).getApplicationInfo(any(),
                 anyInt());