[wpa_supplicant] Fix merge error that broke VtsHalWifiSupplicantP2pV1_0Target

Fix merge error in notify.c that broke VTS test case
VtsHalWifiSupplicantP2pV1_0Target. Revert the code, and remove code
related to old dbus interface which has been removed from the upstream
version.

Bug: 131376215
Test: vts-tradefed run commandAndExit vts --skip-all-system-status-check --primary-abi-only --skip-preconditions --module VtsHalWifiSupplicantP2pV1_0Target
Test: vts-tradefed run commandAndExit vts --skip-all-system-status-check --primary-abi-only --skip-preconditions --module VtsHalWifiSupplicantV1_0Host
Change-Id: I8248ebb3d7b66a2584408b74bc3ac6bba6877a6e
1 file changed