Add a lot more QS tiles

Fix #53. Also fix Bluetooth connection leaks.

mobile/src/main/java/be/mygod/vpnhotspot/manage/LocalOnlyHotspotTileService.kt

@@ -0,0 +1,54 @@
+package be.mygod.vpnhotspot.manage
+
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.ServiceConnection
+import android.graphics.drawable.Icon
+import android.os.IBinder
+import android.service.quicksettings.Tile
+import androidx.annotation.RequiresApi
+import androidx.core.content.ContextCompat
+import be.mygod.vpnhotspot.LocalOnlyHotspotService
+import be.mygod.vpnhotspot.R
+import be.mygod.vpnhotspot.util.stopAndUnbind
+
+@RequiresApi(26)
+class LocalOnlyHotspotTileService : TetherListeningTileService(), ServiceConnection {
+    private val tile by lazy { Icon.createWithResource(application, R.drawable.ic_device_wifi_tethering) }
+    private var binder: LocalOnlyHotspotService.Binder? = null
+
+    override fun onStartListening() {
+        super.onStartListening()
+        bindService(Intent(this, LocalOnlyHotspotService::class.java), this, Context.BIND_AUTO_CREATE)
+    }
+
+    override fun onStopListening() {
+        stopAndUnbind(this)
+        super.onStopListening()
+    }
+
+    override fun onClick() {
+        val binder = binder
+        if (binder?.iface != null) binder.stop()
+        else ContextCompat.startForegroundService(this, Intent(this, LocalOnlyHotspotService::class.java))
+    }
+
+    override fun onServiceConnected(name: ComponentName?, service: IBinder) {
+        binder = service as LocalOnlyHotspotService.Binder
+        updateTile()
+    }
+
+    override fun onServiceDisconnected(name: ComponentName?) {
+        binder = null
+    }
+
+    override fun updateTile() {
+        qsTile?.run {
+            state = if (binder?.iface == null) Tile.STATE_INACTIVE else Tile.STATE_ACTIVE
+            icon = tile
+            label = getText(R.string.tethering_temp_hotspot)
+            updateTile()
+        }
+    }
+}