chore: expose set_data() and get_data() in uniffi bindings

And in JVM wrapper.
Part of WPB-10919.

crypto-ffi/bindings/jvm/src/main/kotlin/com/wire/crypto/client/CoreCryptoContext.kt

@@ -39,6 +39,23 @@ class CoreCryptoContext(private val cc: CoreCryptoContext) {
         )
     }
 
+    /**
+     * Set arbitrary data to be retrieved by [getData].
+     * This is meant to be used as a check point at the end of a transaction.
+     * The data should be limited to a reasonable size.
+     */
+    suspend fun setData(data: ByteArray) {
+        cc.setData(data)
+    }
+
+    /**
+    * Get the data that has previously been set by [setData], or null if no data has been set.
+    * This is meant to be used as a check point at the end of a transaction.
+    */
+    suspend fun getData(): ByteArray? {
+        return cc.getData()
+    }
+
     /**
      * This is your entrypoint to initialize [com.wire.crypto.client.MLSClient] with a Basic Credential
      */

crypto-ffi/src/generic/context/mod.rs

@@ -87,6 +87,16 @@ impl CoreCrypto {
 
 #[uniffi::export]
 impl CoreCryptoContext {
+    /// See [core_crypto::context::CentralContext::set_data].
+    pub async fn set_data(&self, data: Vec<u8>) -> CoreCryptoResult<()> {
+        self.context.set_data(data).await.map_err(Into::into)
+    }
+
+    /// See [core_crypto::context::CentralContext::get_data].
+    pub async fn get_data(&self) -> CoreCryptoResult<Option<Vec<u8>>> {
+        self.context.get_data().await.map_err(Into::into)
+    }
+
     /// See [core_crypto::context::CentralContext::mls_init]
     pub async fn mls_init(
         &self,