fixed：
App does not match system contact with call number

1. Prioritize the use of IPV4.
2. Fixed the bug of button flashing when using Bluetooth headsets.
3. Fixed the bug of incomplete playback of recording prompts.
4. Re-implementation of status function

1. Prioritize the use of IPV4.
2. Fixed the bug of button flashing when using Bluetooth headsets.
3. Fixed the bug of incomplete playback of recording prompts.
4. Re-implementation of status function

fixed:
improved stability

Compatible with PBX v16

1:Upgrade the new SIP SDK 18.2
2:Stability improvement

1. Support iPad
2. Stability optimization