[Expressive Battery] Implement the expressive style for anomaly hint chip

For expressive style:
- Update the padding start & end of pref with anomaly hint
- Add the new background res to update anomaly hint style to outlined
- Reduce the vertical space between pref text and anomaly hint.

Bug: 349652542
Test: visual
Flag: com.android.settingslib.widget.theme.flags.is_expressive_design_enabled
Change-Id: Iec9240d2edba5042c5a1f740b662db75bea41d0e

res/layout/power_anomaly_hints.xml

@@ -17,13 +17,12 @@
 
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:orientation="horizontal"
     android:gravity="center_vertical|start"
-    android:padding="8dp"
-    android:background="@drawable/battery_hints_chip_bg_ripple">
+    android:id="@+id/warning_chip"
+    android:padding="8dp">
 
     <ImageView
         android:layout_width="16dp"