增加转义（？）

app/src/main/cpp/PhoneDevice.cpp

@@ -391,12 +391,12 @@ bool CPhoneDevice::SelfTest(std::string& result)
     double fr = ((double)si.available * 100.0f) / ((double)si.capacity);
     result += "存储剩余：";
     result += std::to_string((int)fr);
-    result += "%\r\n";
+    result += "%%\r\n";
 
     long fm = android_os_Process_getFreeMemory();
     long tm = android_os_Process_getTotalMemory();
     double fmp = ((double)fm * 100.0f) / ((double)tm);
-    result += std::string("可用内存：") + std::to_string((int)fmp) + std::string("%\r\n");
+    result += std::string("可用内存：") + std::to_string((int)fmp) + std::string("%%\r\n");
 
     return true;
 }