Expose `SavedStateConfig` properties as public

- We have cases where `SavedStateConfig` properties need to be used in other modules, such as handling fallbacks with `serializersModule.serializer()` to support contextual and polymorphic serializers.
- To follow KTX Serialization convention, we are keeping `SavedStateConfig` properties public, similar to how `JsonConfiguration` does.

RelNote: "`SavedStateConfig` properties are now public, enabling other modules to use these configurations."
Bug: 378897438
Test: N/A
Change-Id: Ie5f4997bc61932de390da3699339e01b2e91b514
diff --git a/savedstate/savedstate/api/current.txt b/savedstate/savedstate/api/current.txt
index ba76eee..9c6ddf9 100644
--- a/savedstate/savedstate/api/current.txt
+++ b/savedstate/savedstate/api/current.txt
@@ -175,6 +175,10 @@
   }
 
   public final class SavedStateConfig {
+    method public int getClassDiscriminatorMode();
+    method public kotlinx.serialization.modules.SerializersModule getSerializersModule();
+    property public int classDiscriminatorMode;
+    property public kotlinx.serialization.modules.SerializersModule serializersModule;
     field public static final androidx.savedstate.serialization.SavedStateConfig.Companion Companion;
     field public static final androidx.savedstate.serialization.SavedStateConfig DEFAULT;
   }
diff --git a/savedstate/savedstate/api/restricted_current.txt b/savedstate/savedstate/api/restricted_current.txt
index ff61985..10c068d 100644
--- a/savedstate/savedstate/api/restricted_current.txt
+++ b/savedstate/savedstate/api/restricted_current.txt
@@ -200,7 +200,10 @@
   }
 
   public final class SavedStateConfig {
-    property @kotlin.PublishedApi internal kotlinx.serialization.modules.SerializersModule serializersModule;
+    method public int getClassDiscriminatorMode();
+    method public kotlinx.serialization.modules.SerializersModule getSerializersModule();
+    property public int classDiscriminatorMode;
+    property public kotlinx.serialization.modules.SerializersModule serializersModule;
     field public static final androidx.savedstate.serialization.SavedStateConfig.Companion Companion;
     field public static final androidx.savedstate.serialization.SavedStateConfig DEFAULT;
   }
diff --git a/savedstate/savedstate/bcv/native/current.txt b/savedstate/savedstate/bcv/native/current.txt
index 0da23d7..b58138b 100644
--- a/savedstate/savedstate/bcv/native/current.txt
+++ b/savedstate/savedstate/bcv/native/current.txt
@@ -32,6 +32,8 @@
 }
 
 final class androidx.savedstate.serialization/SavedStateConfig { // androidx.savedstate.serialization/SavedStateConfig|null[0]
+    final val classDiscriminatorMode // androidx.savedstate.serialization/SavedStateConfig.classDiscriminatorMode|{}classDiscriminatorMode[0]
+        final fun <get-classDiscriminatorMode>(): kotlin/Int // androidx.savedstate.serialization/SavedStateConfig.classDiscriminatorMode.<get-classDiscriminatorMode>|<get-classDiscriminatorMode>(){}[0]
     final val serializersModule // androidx.savedstate.serialization/SavedStateConfig.serializersModule|{}serializersModule[0]
         final fun <get-serializersModule>(): kotlinx.serialization.modules/SerializersModule // androidx.savedstate.serialization/SavedStateConfig.serializersModule.<get-serializersModule>|<get-serializersModule>(){}[0]
 
diff --git a/savedstate/savedstate/src/commonMain/kotlin/androidx/savedstate/serialization/SavedStateConfig.kt b/savedstate/savedstate/src/commonMain/kotlin/androidx/savedstate/serialization/SavedStateConfig.kt
index 95a1e34..6a881c4 100644
--- a/savedstate/savedstate/src/commonMain/kotlin/androidx/savedstate/serialization/SavedStateConfig.kt
+++ b/savedstate/savedstate/src/commonMain/kotlin/androidx/savedstate/serialization/SavedStateConfig.kt
@@ -38,9 +38,9 @@
  */
 public class SavedStateConfig
 private constructor(
-    @PublishedApi internal val serializersModule: SerializersModule = EmptySerializersModule(),
+    public val serializersModule: SerializersModule = EmptySerializersModule(),
     @ClassDiscriminatorMode.Definition
-    internal val classDiscriminatorMode: Int = ClassDiscriminatorMode.POLYMORPHIC,
+    public val classDiscriminatorMode: Int = ClassDiscriminatorMode.POLYMORPHIC,
 ) {
     /**
      * Builder of the [SavedStateConfig] instance provided by `SavedStateConfig { ... }` factory