Update colors for Digital Wellbeing Toast.

Bug: 179922117
Test: Local
Change-Id: Iec58238ba92218ab2a22027b9c821804fb0d9df2

quickstep/res/drawable/bg_wellbeing_toast.xml

@@ -13,7 +13,9 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
-    <solid android:color="#E61A73E8" />
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:priv-android="http://schemas.android.com/apk/prv/res/android"
+    android:shape="rectangle">
+    <solid android:color="?priv-android:attr/colorAccentPrimary" />
     <corners android:radius="?android:attr/dialogCornerRadius" />
 </shape>

quickstep/res/layout/digital_wellbeing_toast.xml

@@ -16,12 +16,13 @@
 -->
 <TextView
     xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:priv-android="http://schemas.android.com/apk/prv/res/android"
+    style="@style/TextTitle"
     android:layout_width="match_parent"
     android:layout_height="48dp"
     android:background="@drawable/bg_wellbeing_toast"
-    android:fontFamily="sans-serif"
     android:forceHasOverlappingRendering="false"
     android:gravity="center"
     android:importantForAccessibility="noHideDescendants"
-    android:textColor="@android:color/white"
+    android:textColor="?priv-android:attr/textColorOnAccent"
     android:textSize="14sp"/>