P2P: set persistent reconnect true on getInterface

Sets persistent_reconnect true on the p2p interface, allowing p2p
persistent groups to reconnect on invitation without reexecuting
WPS config method. This restores p2p group reinvocation behaviour to
what it was pre-HIDL.

Bug: 37715629
Bug: 63608709
Test: Manually verified
Change-Id: I5d9d8fbc781528a134aab6e4bb2787d9e76311c6
1 file changed