dataconnect: Add JavaTimeLocalDateSerializer and KotlinxDatetimeLocalDateSerializer (#6519)

Author: dconeybe

firebase-dataconnect/CHANGELOG.md

@@ -30,6 +30,12 @@
   paired with code generated by version 1.7.0 (or later) of the Data Connect
   emulator.
   ([#6513](https://github.com/firebase/firebase-android-sdk/pull/6513))
+* [feature] JavaTimeLocalDateSerializer and KotlinxDatetimeLocalDateSerializer
+  added, to enable using the standard "local date" classes `java.time.LocalDate`
+  and/or `kotlinx.datetime.LocalDate` instead of the bespoke
+  `com.google.firebase.dataconnect.LocalDate` class for `Date` GraphQL fields
+  and variables.
+  ([#6519](https://github.com/firebase/firebase-android-sdk/pull/6519))
 
 # 16.0.0-beta02
 * [changed] Updated protobuf dependency to `3.25.5` to fix

firebase-dataconnect/api.txt

@@ -310,6 +310,22 @@ package com.google.firebase.dataconnect.serializers {
     field @NonNull public static final com.google.firebase.dataconnect.serializers.AnyValueSerializer INSTANCE;
   }
 
+  public final class JavaTimeLocalDateSerializer implements kotlinx.serialization.KSerializer<java.time.LocalDate> {
+    method @NonNull public java.time.LocalDate deserialize(@NonNull kotlinx.serialization.encoding.Decoder decoder);
+    method @NonNull public kotlinx.serialization.descriptors.SerialDescriptor getDescriptor();
+    method public void serialize(@NonNull kotlinx.serialization.encoding.Encoder encoder, @NonNull java.time.LocalDate value);
+    property @NonNull public kotlinx.serialization.descriptors.SerialDescriptor descriptor;
+    field @NonNull public static final com.google.firebase.dataconnect.serializers.JavaTimeLocalDateSerializer INSTANCE;
+  }
+
+  public final class KotlinxDatetimeLocalDateSerializer implements kotlinx.serialization.KSerializer<kotlinx.datetime.LocalDate> {
+    method @NonNull public kotlinx.datetime.LocalDate deserialize(@NonNull kotlinx.serialization.encoding.Decoder decoder);
+    method @NonNull public kotlinx.serialization.descriptors.SerialDescriptor getDescriptor();
+    method public void serialize(@NonNull kotlinx.serialization.encoding.Encoder encoder, @NonNull kotlinx.datetime.LocalDate value);
+    property @NonNull public kotlinx.serialization.descriptors.SerialDescriptor descriptor;
+    field @NonNull public static final com.google.firebase.dataconnect.serializers.KotlinxDatetimeLocalDateSerializer INSTANCE;
+  }
+
   public final class LocalDateSerializer implements kotlinx.serialization.KSerializer<com.google.firebase.dataconnect.LocalDate> {
     method @NonNull public com.google.firebase.dataconnect.LocalDate deserialize(@NonNull kotlinx.serialization.encoding.Decoder decoder);
     method @NonNull public kotlinx.serialization.descriptors.SerialDescriptor getDescriptor();