feat: add finishing of group push for initial group creation and saving group configs to DB. re-implement key signing messages properly for the signing config which doesn't override the config base

libsession-util/src/main/cpp/group_keys.cpp

@@ -2,6 +2,13 @@
 #include "group_info.h"
 #include "group_members.h"
 
+extern "C"
+JNIEXPORT jint JNICALL
+        Java_network_loki_messenger_libsession_1util_GroupKeysConfig_00024Companion_storageNamespace(JNIEnv* env,
+                                                                                                     jobject thiz) {
+    return (jint)session::config::Namespace::GroupKeys;
+}
+
 extern "C"
 JNIEXPORT jobject JNICALL
 Java_network_loki_messenger_libsession_1util_GroupKeysConfig_00024Companion_newInstance(JNIEnv *env,

libsession-util/src/main/cpp/group_members.h

@@ -4,7 +4,7 @@
 #include "util.h"
 
 inline session::config::groups::Members* ptrToMembers(JNIEnv* env, jobject obj) {
-    jclass configClass = env->FindClass("network/loki/messenger/libsession_util/GroupMemberConfig");
+    jclass configClass = env->FindClass("network/loki/messenger/libsession_util/GroupMembersConfig");
     jfieldID pointerField = env->GetFieldID(configClass, "pointer", "J");
     return (session::config::groups::Members*) env->GetLongField(obj, pointerField);
 }

libsession-util/src/main/java/network/loki/messenger/libsession_util/Config.kt

@@ -288,8 +288,10 @@ class GroupKeysConfig(pointer: Long): ConfigBase(pointer), Closeable {
             info: GroupInfoConfig,
             members: GroupMembersConfig
         ): GroupKeysConfig
+        external fun storageNamespace(): Int
     }
     external fun groupKeys(): Stack<ByteArray>
+    external fun keyDump(): ByteArray
     external fun loadKey(hash: String,
                          data: ByteArray,
                          msgId: ByteArray,