Add cfg around inadvertent use of sqlite in matrix-sdk-ffi crate

Several new functions implicitly rely on the sqlite config.
sqlite might not be present if you are using the indexedb store, in which case
these functions are likely irrelevant.

This change conditionalizes their compilation.

bindings/matrix-sdk-ffi/src/encryption.rs

@@ -290,6 +290,7 @@ pub enum BundleExportError {
     InvalidBackup,
 }
 
+#[cfg(feature = "sqlite")]
 impl From<matrix_sdk::encryption::BundleExportError> for BundleExportError {
     fn from(value: matrix_sdk::encryption::BundleExportError) -> Self {
         match value {
@@ -312,31 +313,9 @@ impl From<serde_json::Error> for BundleExportError {
     }
 }
 
+#[cfg(feature = "sqlite")]
 #[matrix_sdk_ffi_macros::export]
 impl SecretsBundleWithUserId {
-    /// Attempt to create a [`SecretsBundle`] from a previously JSON serialized
-    /// bundle.
-    #[uniffi::constructor]
-    pub fn from_str(
-        user_id: &str,
-        bundle: &str,
-        backup_info: &str,
-    ) -> Result<Arc<Self>, BundleExportError> {
-        let user_id =
-            OwnedUserId::from_str(user_id).map_err(|e| serde_json::Error::custom(e.to_string()))?;
-        let bundle: matrix_sdk_base::crypto::types::SecretsBundle = serde_json::from_str(bundle)?;
-        let backup_info = serde_json::from_str(backup_info)?;
-
-        let is_backup_ok =
-            bundle.backup.as_ref().is_some_and(|backup| is_valid_backup(backup, &backup_info));
-
-        if is_backup_ok {
-            Ok(Self { user_id, inner: bundle }.into())
-        } else {
-            Err(BundleExportError::InvalidBackup)
-        }
-    }
-
     /// Attempt to export a [`SecretsBundle`] from a crypto store.
     ///
     /// This method can be used to retrieve a [`SecretsBundle`] from an existing
@@ -376,6 +355,32 @@ impl SecretsBundleWithUserId {
 
         ret
     }
+}
+
+#[matrix_sdk_ffi_macros::export]
+impl SecretsBundleWithUserId {
+    /// Attempt to create a [`SecretsBundle`] from a previously JSON serialized
+    /// bundle.
+    #[uniffi::constructor]
+    pub fn from_str(
+        user_id: &str,
+        bundle: &str,
+        backup_info: &str,
+    ) -> Result<Arc<Self>, BundleExportError> {
+        let user_id =
+            OwnedUserId::from_str(user_id).map_err(|e| serde_json::Error::custom(e.to_string()))?;
+        let bundle: matrix_sdk_base::crypto::types::SecretsBundle = serde_json::from_str(bundle)?;
+        let backup_info = serde_json::from_str(backup_info)?;
+
+        let is_backup_ok =
+            bundle.backup.as_ref().is_some_and(|backup| is_valid_backup(backup, &backup_info));
+
+        if is_backup_ok {
+            Ok(Self { user_id, inner: bundle }.into())
+        } else {
+            Err(BundleExportError::InvalidBackup)
+        }
+    }
 
     /// Does the bundle contain a backup key.
     ///
@@ -428,6 +433,7 @@ pub fn json_string_contains_secrets_bundle(
 }
 
 /// Check if a crypto store contains a valid [`SecretsBundle`].
+#[cfg(feature = "sqlite")]
 #[matrix_sdk_ffi_macros::export]
 pub async fn database_contains_secrets_bundle(
     database_path: &str,