Updated proguard rules for R8 full mode

app/proguard-rules.pro

@@ -38,4 +38,20 @@
 
 -keep public class zechs.mpv.MPVLib {
     *;
-}
+}
+
+# Retain generic signatures of TypeToken and its subclasses with R8 version 3.0 and higher.
+-keep,allowobfuscation,allowshrinking class com.google.gson.reflect.TypeToken
+-keep,allowobfuscation,allowshrinking class * extends com.google.gson.reflect.TypeToken
+
+# Keep generic signature of Call, Response (R8 full mode strips signatures from non-kept items).
+-keep,allowobfuscation,allowshrinking interface retrofit2.Call
+-keep,allowobfuscation,allowshrinking class retrofit2.Response
+
+# With R8 full mode generic signatures are stripped for classes that are not
+# kept. Suspend functions are wrapped in continuations where the type argument
+# is used.
+-keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation
+
+# R8 full mode strips signatures from non-kept items.
+-keep,allowobfuscation,allowshrinking class zechs.drive.stream.utils.state.Resource