Trigger save of the RD pipeline cache on application pause

platform/android/display_server_android.cpp

@@ -717,6 +717,14 @@ void DisplayServerAndroid::notify_surface_changed(int p_width, int p_height) {
 	}
 }
 
+void DisplayServerAndroid::notify_application_paused() {
+#if defined(RD_ENABLED)
+	if (rendering_device) {
+		rendering_device->update_pipeline_cache();
+	}
+#endif // defined(RD_ENABLED)
+}
+
 DisplayServerAndroid::DisplayServerAndroid(const String &p_rendering_driver, DisplayServer::WindowMode p_mode, DisplayServer::VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i *p_position, const Vector2i &p_resolution, int p_screen, Context p_context, int64_t p_parent_window, Error &r_error) {
 	rendering_driver = p_rendering_driver;
 

platform/android/display_server_android.h

@@ -247,6 +247,7 @@ public:
 
 	void reset_window();
 	void notify_surface_changed(int p_width, int p_height);
+	void notify_application_paused();
 
 	virtual Point2i mouse_get_position() const override;
 	virtual BitField<MouseButtonMask> mouse_get_button_state() const override;

platform/android/java/nativeSrcsConfigs/CMakeLists.txt

@@ -21,4 +21,12 @@ target_include_directories(${PROJECT_NAME}
         ${ANDROID_ROOT_DIR}
         ${OPENXR_INCLUDE_DIR})
 
-add_definitions(-DUNIX_ENABLED -DVULKAN_ENABLED -DANDROID_ENABLED -DGLES3_ENABLED -DTOOLS_ENABLED -DDEBUG_ENABLED)
+add_definitions(
+        -DUNIX_ENABLED
+        -DVULKAN_ENABLED
+        -DANDROID_ENABLED
+        -DGLES3_ENABLED
+        -DTOOLS_ENABLED
+        -DDEBUG_ENABLED
+        -DRD_ENABLED
+)

platform/android/java_godot_lib_jni.cpp

@@ -624,6 +624,10 @@ JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_onRendererPaused(JNIE
 	if (os_android->get_main_loop()) {
 		os_android->get_main_loop()->notification(MainLoop::NOTIFICATION_APPLICATION_PAUSED);
 	}
+
+	if (DisplayServerAndroid *dsa = Object::cast_to<DisplayServerAndroid>(DisplayServer::get_singleton())) {
+		dsa->notify_application_paused();
+	}
 }
 
 JNIEXPORT void JNICALL Java_org_godotengine_godot_GodotLib_onScreenRotationChange(JNIEnv *env, jclass clazz, jint p_orientation) {