Check FEATURE_BLUETOOTH for Companion Device Test in CTS-V

Issue:
 "Companion Device Test” does not check for Bluetooth Feature Presence.
  This causes the app to crash.

    AndroidRuntime: java.lang.RuntimeException: Unable to create service
    com.android.companiondevicemanager.DeviceDiscoveryService: java.lang.NullPointerException:
    Attempt to invoke virtual method 'android.bluetooth.le.BluetoothLeScanner
    android.bluetooth.BluetoothAdapter.getBluetoothLeScanner()' on a null object reference

Root Cause:
 In CN80G Batch SKU devices, Bluetooth feature is not present and hence this fails.

Fix:
 The fix should be in the test case to check for FEATURE_BLUETOOTH before running
 tests. If Feature not supported, the test case is not applicable.

 This patch is an indicative patch to request for waiver from Google for this failure

Change-Id: I132b57e8b5a6075da0db0395dc0333bdbbbf08ec