修改android wifi热点默认网关

1.文件 frameworks/base/services/core/java/com/android/server/connectivity/Tethering.java

"192.168.43.2", "192.168.43.254" 修改为 "192.168.1.2", "192.168.1.254" 

 2、文件frameworks/opt/net/wifi/service/java/com/android/server/wifi/WifiStateMachine.java

NetworkUtils.numericToInetAddress("192.168.43.1"), 24)); 修改为 NetworkUtils.numericToInetAddress("192.168.1.1"), 24));