lisa: vAB: Move GSI AVB keys to /vendor_boot

Change-Id: I59cac1103239dbd885986a98b2edd70ce1391e8a

BoardConfig.mk

@@ -228,6 +228,7 @@ BOARD_AVB_VBMETA_SYSTEM_KEY_PATH := external/avb/test/data/testkey_rsa2048.pem
 BOARD_AVB_VBMETA_SYSTEM_ALGORITHM := SHA256_RSA2048
 BOARD_AVB_VBMETA_SYSTEM_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
 BOARD_AVB_VBMETA_SYSTEM_ROLLBACK_INDEX_LOCATION := 1
+BOARD_MOVE_GSI_AVB_KEYS_TO_VENDOR_BOOT := true
 
 # WiFi
 BOARD_WLAN_DEVICE := qcwcn