BLE Throughput

1. Support mtu exchange

2. support loopback, ack and no responese test mode for Android 5.x to 6.0

3. Added BLE device interval time change

4. UUID list:

UUID_SERVICE_BLE_DEVICE_INTERVAL = UUID.fromString("0000e050-0000-1000-8000-00805f9b34fb");

UUID_CHAR_BLE_DEVICE_INTERVAL = UUID.fromString("0000f050-0000-1000-8000-00805f9b34fb");

UUID_SERVICE_BLE_THRUPUT_TEST = UUID.fromString("8832ab08-ba2d-0184-004c-68c08e2190bf");

UUID_CHAR_BLE_THRUPUT_TEST_WRITE = UUID.fromString("361e118a-5524-29b6-0345-b15e12e25b34");

UUID_CHAR_BLE_THRUPUT_TEST_LB = UUID.fromString("361e118a-5524-29b6-0345-b15e12e25b34");

CLIENT_CHARACTERISTIC_CONFIG = "00002902-0000-1000-8000-00805f9b34fb";