Improve current playing song visibility

Disable scroll animation because not visible and causing bugs on first interaction

ultrasonic/src/main/kotlin/org/moire/ultrasonic/adapters/TrackViewHolder.kt

@@ -1,5 +1,6 @@
 package org.moire.ultrasonic.adapters
 
+import android.graphics.PorterDuff
 import android.view.View
 import android.widget.Checkable
 import android.widget.CheckedTextView
@@ -45,6 +46,7 @@ class TrackViewHolder(val view: View) :
 
     var entry: Track? = null
         private set
+    var songLayout: LinearLayout = view.findViewById(R.id.song_layout)
     var check: CheckedTextView = view.findViewById(R.id.song_check)
     var drag: ImageView = view.findViewById(R.id.song_drag)
     var observableChecked = MutableLiveData(false)
@@ -170,11 +172,13 @@ class TrackViewHolder(val view: View) :
             title.setCompoundDrawablesWithIntrinsicBounds(
                 playingIcon, null, null, null
             )
+            songLayout.backgroundTintMode = PorterDuff.Mode.ADD
         } else if (!isPlaying && isPlayingCached) {
             isPlayingCached = false
             title.setCompoundDrawablesWithIntrinsicBounds(
                 0, 0, 0, 0
             )
+            songLayout.backgroundTintMode = PorterDuff.Mode.MULTIPLY
         }
     }
 

ultrasonic/src/main/kotlin/org/moire/ultrasonic/fragment/PlayerFragment.kt

@@ -481,9 +481,7 @@ class PlayerFragment :
         val index = mediaPlayerManager.currentMediaItemIndex
 
         if (index != -1) {
-            val smoothScroller = LinearSmoothScroller(context)
-            smoothScroller.targetPosition = index
-            viewManager.startSmoothScroll(smoothScroller)
+            viewManager.scrollToPosition(index)
         }
     }
 

ultrasonic/src/main/res/layout/list_item_track.xml

@@ -5,6 +5,9 @@
     a:id="@+id/song_layout"
     a:layout_width="fill_parent"
     a:layout_height="?android:attr/listPreferredItemHeight"
+    a:background="#00000000"
+    a:backgroundTint="@color/material_on_surface_stroke"
+    a:backgroundTintMode="multiply"
     a:minHeight="?android:attr/listPreferredItemHeight"
     a:orientation="horizontal">