Update Proguard rules to handle serializers in all modules

Fixes #8112

app/proguard-rules.pro

@@ -51,11 +51,11 @@
     kotlinx.serialization.KSerializer serializer(...);
 }
 
--keep,includedescriptorclasses class eu.kanade.tachiyomi.**$$serializer { *; }
--keepclassmembers class eu.kanade.tachiyomi.** {
+-keep,includedescriptorclasses class eu.kanade.**$$serializer { *; }
+-keepclassmembers class eu.kanade.** {
     *** Companion;
 }
--keepclasseswithmembers class eu.kanade.tachiyomi.** {
+-keepclasseswithmembers class eu.kanade.** {
     kotlinx.serialization.KSerializer serializer(...);
 }