Allow Bluetooth HAL to access /sys/class/rfkill

Test: compiles; HAL can write rfkill state
Change-Id: I5815a1f50ef8d09bf83541a6d2389b61bd007306
diff --git a/libcutils/fs_config.c b/libcutils/fs_config.c
index 6155d16..6fb52cc 100644
--- a/libcutils/fs_config.c
+++ b/libcutils/fs_config.c
@@ -163,6 +163,10 @@
                                            CAP_MASK_LONG(CAP_NET_RAW),
                                               "system/bin/hw/android.hardware.wifi@1.0-service" },
 
+    /* Support Bluetooth legacy hal accessing /sys/class/rfkill */
+    { 00700, AID_BLUETOOTH, AID_BLUETOOTH, CAP_MASK_LONG(CAP_NET_ADMIN),
+                                              "system/bin/hw/android.hardware.bluetooth@1.0-service" },
+
     /* A non-privileged zygote that spawns isolated processes for web rendering. */
     { 0750,  AID_ROOT,      AID_ROOT,      CAP_MASK_LONG(CAP_SETUID) |
                                            CAP_MASK_LONG(CAP_SETGID) |