hostapd(hidl): Don't compile the HIDL interface for gce

On GCE platform hostapd is used to simulate a virtual wifi access point
before the android platform is brought up. So, we don't need the hostapd
binary to have HIDL interface support.

Bug: 36646171
Test: Compiles on gce_x86_phone
Test: Waiting for presubmit tests
Change-Id: Ic484d4b43c07e8e3b7613d120ce257df8d791b44
1 file changed