chromecast: disable passthrough by default

vlc-android/res/xml/preferences_casting.xml

@@ -6,7 +6,7 @@
     <PreferenceCategory android:title="@string/casting_category">
         <CheckBoxPreference
             android:key="casting_passthrough"
-            android:defaultValue="true"
+            android:defaultValue="false"
             android:summary="@string/casting_passthrough_summary"
             android:title="@string/casting_passthrough_title" />
         <ListPreference

vlc-android/src/org/videolan/vlc/util/VLCOptions.java

@@ -128,7 +128,7 @@ public class VLCOptions {
 
         //Chromecast
         options.add(verboseMode ? "-vv" : "-v");
-        if (pref.getBoolean("casting_passthrough", true)) options.add("--sout-chromecast-audio-passthrough");
+        if (pref.getBoolean("casting_passthrough", false)) options.add("--sout-chromecast-audio-passthrough");
         else options.add("--no-sout-chromecast-audio-passthrough");
         options.add("--sout-chromecast-conversion-quality="+pref.getString("casting_quality", "2"));