binder: Implement enable/disable/select network

Implement the following control methods:
1. EnableNetwork
2. DisableNetwork
3. SelectNetwork

BUG: 1252274
Change-Id: I61042baed83088d61a2946eb5a1205df30ff2518
TEST: Ran 'wpa_supplicant_binder_test'
Signed-off-by: Roshan Pius <rpius@google.com>
2 files changed