Proguard: Add kotlinx rules

vlc-android/proguard.cfg

@@ -71,8 +71,12 @@
 # Kotlinx
 -keep class kotlinx.coroutines.internal.MainDispatcherFactory { *; }
 -keep class kotlinx.coroutines.android.AndroidExceptionPreHandler { *; }
+-keep class kotlinx.coroutines.CoroutineExceptionHandler { *; }
 -keep class kotlinx.coroutines.android.AndroidDispatcherFactory { *; }
-
+-keep class kotlin.Result { *; }
+-keepclassmembernames class kotlinx.** {
+    volatile <fields>;
+}
 # Retrofit
 # Retrofit does reflection on generic parameters. InnerClasses is required to use Signature and
 # EnclosingMethod is required to use InnerClasses.