kernel: Rewrite kernle version code management

Co-authored-by: lamadaemon <i@lama.icu>
Signed-off-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>

manager/app/src/main/cpp/jni.c

@@ -345,4 +345,10 @@ NativeBridgeNP(getSusfsFeatureStatus, jobject) {
     GetEnvironment()->SetBooleanField(env, obj, statusSusSuField, status.status_sus_su);
 
     return obj;
+}
+
+NativeBridgeNP(getFullVersion, jstring) {
+    char buff[255] = { 0 };
+    get_full_version((char *) &buff);
+    return GetEnvironment()->NewStringUTF(env, buff);
 }