binder: Implement Set/Get network params (Part 3)

Implement the following Set/Get methods:
1. KeyMgmt
2. Proto
3. Auth Alg
3. PairWise Cipher
4. Group Cipher

BUG: 1252274
TEST: Ran 'wpa_supplicant_binder_test'

Change-Id: Ic473e8976db2e0ee8a551c3ecfa1133d14c8b290
Signed-off-by: Roshan Pius <rpius@google.com>
3 files changed