support hardware bluetooth and usb accessory features

Make sure that applications can query vexpress for bluetooth and
USB accessory features.

It helps to PASS following CTS tests:
android.app.cts.SystemFeaturesTest#testBluetoothFeature
android.app.cts.SystemFeaturesTest#testUsbAccessory

Above tests rely only on feature availability property and do not
really probe respective features for functionality.

Change-Id: I4c901ec2319455d80b6eff32cc77e0ae5fd3e56f
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
1 file changed