[WPA3] Added setGroupMgmtCipher and getGroupMgmtCipher for Suite-B

Adde setGroupMgmtCipher and getGroupMgmtCipher required for
WPA3-Enterprise Suite-B. Valid options are BIP_GMAC_128, BIP_GMAC_256
and BIP_CMAC_256.

Bug: 112195778
Test: atest com.android.server.wifi
Change-Id: I8c384173c415e3c3620b4ed06fb6b3d2b4ced27f
2 files changed