WifiManager: return errors for WPS API calls

WPS support in Client mode is deprecated.  Trigger onFailed callbacks
for WPS operations. Added unit tests to check for error callbacks.

Bug: 72168432
Test: frameworks/base/wifi/tests/runtests.sh
Change-Id: I442afd75b6b3ed3d43488cc2185274e9584352d1
2 files changed