SupplicantStaNetworkHal: Remove enclosing quotes from psk

The settings app seems to be quoting psk passphrase. So, remove those
when we add it to wpa_supplicant.

Bug: 33383725
Test: Unit tests
Test: Able to connect to psk networks now.
Change-Id: I68e9d377a97d7ad1393e14e6e5371ef9f9fab439
4 files changed
tree: 6b9daecd7f61651e9b3e0435fa2395beac540247
  1. libwifi_hal/
  2. libwifi_system/
  3. service/
  4. tests/
  5. PREUPLOAD.cfg