adb: Fix secure adb when booting with usb attached

When booting with usb attached, the secure adb authentication happens
long before the framework is done booting, so adb can't notify the
framework to install the public key.

Change-Id: Id2af6cebece345022f56cb0c4b5af24e1d7a425c
diff --git a/adb/adb.c b/adb/adb.c
index c57a875..18983c4 100644
--- a/adb/adb.c
+++ b/adb/adb.c
@@ -326,7 +326,7 @@
     send_packet(cp, t);
 }
 
-static void send_auth_request(atransport *t)
+void send_auth_request(atransport *t)
 {
     D("Calling send_auth_request\n");
     apacket *p;