wpa_supplicant(hidl): Send EAP identity as string

EAP identity is a string and not a vector of bytes that needs to be hex
encoded.

Bug: 35812320
Test: Verified connecting to new EAP sim networks. This would previusly
only work after a reboot (There is another path thru which this
identity is set in wpa_supplicant for existing networks)

Change-Id: I068f6f26a96e5c0a669445e711224638d876148d
1 file changed