p2p: early return if p2p interface is not available yet.

addGroup_1_2 would access global p2p instance in several places
internally. If p2p interface is not available, just return failure
at the beginning.

Fixes: 141773120
Bug: 141773120
Test: atest VtsHalWifiSupplicantP2pV1_2TargetTest
Change-Id: I424d5fd35c6f2dd84833141262988a052bf00871
1 file changed