Revert "Remove capability setting for legacy_wifi_hal"

This reverts commit faf317b7e9dba3dd981aea579baebe770505e33d.

Bug: 37713566
Test: Able to connect to GoogleGuest on Fugu
diff --git a/libcutils/fs_config.c b/libcutils/fs_config.c
index 1b7139b..b802202 100644
--- a/libcutils/fs_config.c
+++ b/libcutils/fs_config.c
@@ -195,6 +195,11 @@
                                            CAP_MASK_LONG(CAP_SYS_NICE),
                                               "vendor/bin/hw/android.hardware.bluetooth@1.0-service" },
 
+    /* Support wifi_hal_legacy administering a network interface. */
+    { 00755, AID_WIFI,      AID_WIFI,      CAP_MASK_LONG(CAP_NET_ADMIN) |
+                                           CAP_MASK_LONG(CAP_NET_RAW),
+                                              "vendor/bin/hw/android.hardware.wifi@1.0-service" },
+
     /* A non-privileged zygote that spawns
      * isolated processes for web rendering. */
     { 0750,  AID_ROOT,      AID_ROOT,      CAP_MASK_LONG(CAP_SETUID) |