Make Settings Slider Slices one row

To unify all Settings slices into one row, we change
Settings Slider from user a header and a input range to
only using an Input Range.

Change-Id: I61715a45b29b6a52a47711811e5c6b2c83d50901
Fixes: 80430118
Test: robotests

tests/robotests/src/com/android/settings/testutils/SliceTester.java

@@ -43,6 +43,7 @@ import androidx.slice.SliceMetadata;
 import androidx.slice.builders.ListBuilder;
 import androidx.slice.core.SliceAction;
 import androidx.slice.core.SliceQuery;
+import androidx.slice.widget.EventInfo;
 
 import android.support.v4.graphics.drawable.IconCompat;
 
@@ -159,6 +160,9 @@ public class SliceTester {
         final long sliceTTL = metadata.getExpiry();
         assertThat(sliceTTL).isEqualTo(ListBuilder.INFINITY);
 
+        final int headerType = metadata.getHeaderType();
+        assertThat(headerType).isEqualTo(EventInfo.ROW_TYPE_SLIDER);
+
         // Check primary intent
         final PendingIntent primaryPendingIntent = primaryAction.getAction();
         assertThat(primaryPendingIntent).isEqualTo(