Fix/foreground permissions scanning (#556)

* try catch the foreground location service if not available

* ask for background permissions

* background permissions in onboarding

* small improvements

app/src/main/java/com/bitchat/android/mesh/BluetoothPermissionManager.kt

@@ -33,9 +33,9 @@ class BluetoothPermissionManager(private val context: Context) {
             Manifest.permission.ACCESS_COARSE_LOCATION,
             Manifest.permission.ACCESS_FINE_LOCATION
         ))
-        
+
         return permissions.all { 
             ActivityCompat.checkSelfPermission(context, it) == PackageManager.PERMISSION_GRANTED 
         }
     }
-} 
+}