Secure access to WifiScanner

This change implements access control for WifiScanner. It is now
available to only those apps that have CONNECTIVITY_INTERNAL permissions.

Bug: 15088601
Change-Id: I6acc13079b6dac6f190644b6d1a270c271cc679f
diff --git a/wifi/java/android/net/wifi/WifiScanner.java b/wifi/java/android/net/wifi/WifiScanner.java
index e7bcb23..5ba26e3 100644
--- a/wifi/java/android/net/wifi/WifiScanner.java
+++ b/wifi/java/android/net/wifi/WifiScanner.java
@@ -75,6 +75,8 @@
     public static final int REASON_INVALID_LISTENER = -2;
     /** Invalid request */
     public static final int REASON_INVALID_REQUEST = -3;
+    /** Invalid request */
+    public static final int REASON_NOT_AUTHORIZED = -4;
 
     /**
      * Generic action callback invocation interface