Add logic to unregister the Godot plugins on engine termination

platform/android/java_godot_lib_jni.cpp

@@ -42,6 +42,7 @@
 #include "jni_utils.h"
 #include "net_socket_android.h"
 #include "os_android.h"
+#include "plugin/godot_plugin_jni.h"
 #include "string_android.h"
 #include "thread_jandroid.h"
 #include "tts_android.h"
@@ -78,6 +79,9 @@ static void _terminate(JNIEnv *env, bool p_restart = false) {
 	step.set(-1); // Ensure no further steps are attempted and no further events are sent
 
 	// lets cleanup
+	// Unregister android plugins
+	unregister_plugins_singletons();
+
 	if (java_class_wrapper) {
 		memdelete(java_class_wrapper);
 	}