Fix some bug

app/src/leanback/res/drawable/shape_subtitle.xml

@@ -2,7 +2,7 @@
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle">
 
-    <solid android:color="@color/grey_900" />
+    <solid android:color="@color/grey_800" />
 
     <corners android:radius="4dp" />
 

app/src/leanback/res/layout/dialog_subtitle.xml

@@ -24,7 +24,7 @@
         android:id="@+id/slider"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
+        android:layout_marginTop="8dp"
         android:nextFocusDown="@id/positive"
         android:stepSize="1"
         android:valueFrom="14"
@@ -36,7 +36,7 @@
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
+        android:layout_marginTop="8dp"
         android:orientation="horizontal">
 
         <TextView

app/src/mobile/java/com/fongmi/android/tv/ui/activity/DetailActivity.java

@@ -1406,6 +1406,7 @@ public class DetailActivity extends BaseActivity implements Clock.Callback, Cust
         if (isInPictureInPictureMode) {
             mReceiver.register(this);
             enterFullscreen();
+            setSubtitle(12);
             hideControl();
             hideSheet();
         } else {