P2p fixes

- NPE fixes
- Remove group on CTRL-EVENT-DISCONNECTED since the supplicant sometimes misses
the group removed event
- Fix the pattern match since we sometimes end up creating group without passphrase

Bug: 7119140
Bug: 7210558
Change-Id: I2cf0be073aaaaa9b931ea9a79b0bf4bd6a2b32ff
2 files changed