playback: add playing from indicator to fragment

Add the "Playing From" indicator that used be on the queue to the
main playback view.

app/src/main/java/org/oxycblt/auxio/music/Models.kt

@@ -84,7 +84,7 @@ data class Song(
     val album: Album get() = requireNotNull(mAlbum)
 
     val seconds: Long get() = duration / 1000
-    val formattedDuration: String get() = (duration / 1000).toDuration(false)
+    val formattedDuration: String get() = seconds.toDuration(false)
 
     override val hash: Long get() {
         var result = name.hashCode().toLong()

app/src/main/java/org/oxycblt/auxio/playback/PlaybackFragment.kt

@@ -111,6 +111,10 @@ class PlaybackFragment : Fragment() {
             }
         }
 
+        playbackModel.parent.observe(viewLifecycleOwner) { parent ->
+            binding.playbackToolbar.subtitle = parent?.name ?: getString(R.string.lbl_all_songs)
+        }
+
         playbackModel.isShuffling.observe(viewLifecycleOwner) { isShuffling ->
             binding.playbackShuffle.isActivated = isShuffling
         }

app/src/main/res/layout-land/fragment_playback.xml

@@ -32,6 +32,7 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
             app:menu="@menu/menu_playback"
+            tools:subtitle="@string/lbl_all_songs"
             app:title="@string/lbl_playback" />
 
         <ImageView

app/src/main/res/layout-sw600dp-land/fragment_playback.xml

@@ -31,6 +31,7 @@
             style="@style/Widget.Auxio.Toolbar.Icon.Down"
             app:layout_constraintStart_toStartOf="parent"
             app:title="@string/lbl_playback"
+            tools:subtitle="@string/lbl_all_songs"
             app:layout_constraintTop_toTopOf="parent"
             app:menu="@menu/menu_playback" />
 

app/src/main/res/layout-sw600dp/fragment_playback.xml

@@ -32,6 +32,7 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
             app:title="@string/lbl_playback"
+            tools:subtitle="@string/lbl_all_songs"
             app:menu="@menu/menu_playback" />
 
         <ImageView

app/src/main/res/layout-w600dp-land/fragment_playback.xml

@@ -32,6 +32,7 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
             app:title="@string/lbl_playback"
+            tools:subtitle="@string/lbl_all_songs"
             app:menu="@menu/menu_playback" />
 
         <ImageView

app/src/main/res/layout/fragment_playback.xml

@@ -31,6 +31,7 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
             app:title="@string/lbl_playback"
+            tools:subtitle="@string/lbl_all_songs"
             app:menu="@menu/menu_playback" />
 
         <ImageView