adapter: Set max_filter to 0 not empty if filter not supported

adapter: Set max_filter to 0 not empty if filter not supported

D/BLUETOOTH_HAL( 6284): bt-hal-adapter-dbus-handler.c:
    __bt_adapter_all_properties_cb(862) > LE Supported features
D/BLUETOOTH_HAL( 6284): bt-hal-adapter-dbus-handler.c:
    __bt_adapter_all_properties_cb(888) > le supported features values are NOT provided by Stack
...
E/BLUETOOTH_HAL( 2510): bt-hal-adapter-le.c:
    _bt_hal_get_available_adv_slot_id(347) > le_adv_slot is NULL
E/BLUETOOTH_HAL( 2510): bt-hal-gatt-server.c:
    bt_hal_gatts_allocate_adv_slot(3637) > failed to get the adv_slot
E/BLUETOOTH_HAL( 2510): bt-hal-gatt-server.c:
    gatt_server_multi_adv_enable(3749) > failed to get adv_slot

Change-Id: I41515e7efa47dbb2255451e845b209a31d0a6b5f