Add configurable ADB host and port settings

[THE-Locon]

This PR adds the ability to configure custom ADB server host and port through the config.yaml file.

Changes

• Added adb.host and adb.port configuration options in config.yaml
• Updated AdbDeviceManager to accept adb_host and adb_port parameters
• Updated server.py to read ADB configuration from config file
• Added unit tests for custom ADB host/port configuration

Usage

adb:
  host: "127.0.0.1"  # default
  port: 5037         # default, can be changed e.g. to 5038

This is useful for users who have ADB server running on a non-default port.