feat: Linux 真实实现层 — 从存根库变为可用生产力工具

新增 _linux_impl.py (800+行):
- LinuxNetwork: 真实IP/接口/DNS/网关/MAC (ip命令+/proc/net)
- LinuxBluetooth: 真实蓝牙状态/扫描/配对/连接 (bluetoothctl)
- LinuxSensors: 真实温度/CPU频率/风扇 (/sys/class/hwmon)
- LinuxAudio: 真实音量控制/静音 (amixer)
- LinuxClipboard: 真实剪贴板读写 (xclip+tkinter回退)
- LinuxPower: 真实CPU/内存/电池 (psutil+/sys/class/power_supply)
- LinuxLocation: 真实IP地理定位 (ip-api.com)
- LinuxNotify: 真实桌面通知 (notify-send)
- LinuxDisplay: 真实屏幕尺寸/截屏/鼠标位置 (xdotool+X11)
- LinuxUIAutomation: 真实点击/输入/按键/滚动 (xdotool)
- LinuxCamera: 真实摄像头拍照 (opencv/V4L2)
- LinuxProcess: 真实进程列表/系统信息/应用管理 (psutil+/proc)
- LinuxShell: 真实命令执行 (subprocess)

改造10+核心类使用Linux真实实现:
- BluetoothAdapter/SensorManager/AudioManager
- ConnectivityManager/WifiManager/TelephonyManager
- LocationManager/PowerManager/BatteryManager/Build
- ActivityManager/Activity/Toast/Display/ClipboardManager
- NotificationManager

15项真实行为测试全部通过:
- 真实IP: 10.60.218.244
- 真实位置: 北京 39.9042, 116.407
- 真实主机名: work-41-vci-g427c
- 真实内核: 5.15.120.byteatom-ck.14
- 真实内存: 1.8GB/3.8GB
- 真实进程列表

android_pyapi/android/location.py

@@ -16,6 +16,12 @@ from .._core import (
     _sdcard_root, _app_data_dir, _package_name,
 )
 
+try:
+    from .._linux_impl import IS_LINUX, LinuxLocation
+    _USE_LINUX = IS_LINUX
+except ImportError:
+    _USE_LINUX = False
+
 
 # ═══════════════════════════════════════════════════════════════
 # Location
@@ -952,6 +958,15 @@ class LocationManager(Stub):
                                     self.PASSIVE_PROVIDER, self.FUSED_PROVIDER}
 
     def getLastKnownLocation(self, provider: str) -> Optional[Location]:
+        if _USE_LINUX:
+            data = LinuxLocation.get_location()
+            loc = Location(provider or "network")
+            loc.setLatitude(data.get("latitude", 0.0))
+            loc.setLongitude(data.get("longitude", 0.0))
+            loc.setAccuracy(data.get("accuracy", 0))
+            loc.setTime(int(datetime.now().timestamp() * 1000))
+            loc.setProvider(provider or "network")
+            return loc
         if provider in self._last_known_locations:
             return self._last_known_locations[provider]
         loc = Location(provider)
@@ -969,6 +984,18 @@ class LocationManager(Stub):
             provider = provider_or_request
         else:
             provider = self.GPS_PROVIDER
+        if _USE_LINUX and listener_or_callback is not None:
+            data = LinuxLocation.get_location()
+            loc = Location(provider or "network")
+            loc.setLatitude(data.get("latitude", 0.0))
+            loc.setLongitude(data.get("longitude", 0.0))
+            loc.setAccuracy(data.get("accuracy", 0))
+            loc.setTime(int(datetime.now().timestamp() * 1000))
+            loc.setProvider(provider or "network")
+            try:
+                listener_or_callback.onLocationChanged(loc)
+            except Exception:
+                pass
         if listener_or_callback is not None:
             if provider not in self._listeners:
                 self._listeners[provider] = []
@@ -984,9 +1011,13 @@ class LocationManager(Stub):
                 del self._listeners[provider]
 
     def isProviderEnabled(self, provider: str) -> bool:
+        if _USE_LINUX:
+            return provider == "network"
         return provider in self._enabled_providers
 
     def getProviders(self, criteria: Optional[Criteria] = None, enabled_only: bool = False) -> List[str]:
+        if _USE_LINUX:
+            return ["network"]
         providers = list(self._providers.keys())
         if enabled_only:
             providers = [p for p in providers if p in self._enabled_providers]