adb: fix `adb reverse` when adbd has multiple transports.

Plumb the transport that we received the adb reverse request on through
to reverse_service, instead of trying to get a unique transport on
devices that have multiple active transports (e.g. a device with USB
(even unplugged) connected via TCP).

Bug: http://b/37066218
Bug: http://b/71898863
Test: `echo foo | nc -l 12345 & adb reverse tcp:12345 tcp:12345; adb shell nc localhost 12345` on a device connected via TCP
Change-Id: Iae199ae787f2e344126bbcacca8544cfc9844a4c
(cherry picked from commit 44899eeb53eb6260c20891723709ab38ed246349)
diff --git a/adb/services.cpp b/adb/services.cpp
index fe74eb6..0b0c161 100644
--- a/adb/services.cpp
+++ b/adb/services.cpp
@@ -181,14 +181,14 @@
     kick_transport(t);
 }
 
-int reverse_service(const char* command) {
+int reverse_service(const char* command, atransport* transport) {
     int s[2];
     if (adb_socketpair(s)) {
         PLOG(ERROR) << "cannot create service socket pair.";
         return -1;
     }
     VLOG(SERVICES) << "service socketpair: " << s[0] << ", " << s[1];
-    if (handle_forward_request(command, kTransportAny, nullptr, 0, s[1]) < 0) {
+    if (handle_forward_request(command, transport, s[1]) < 0) {
         SendFail(s[1], "not a reverse forwarding command");
     }
     adb_close(s[1]);
@@ -268,7 +268,7 @@
     return s[0];
 }
 
-int service_to_fd(const char* name, const atransport* transport) {
+int service_to_fd(const char* name, atransport* transport) {
     int ret = -1;
 
     if (is_socket_spec(name)) {
@@ -317,7 +317,7 @@
     } else if(!strncmp(name, "usb:", 4)) {
         ret = create_service_thread("usb", restart_usb_service, nullptr);
     } else if (!strncmp(name, "reverse:", 8)) {
-        ret = reverse_service(name + 8);
+        ret = reverse_service(name + 8, transport);
     } else if(!strncmp(name, "disable-verity:", 15)) {
         ret = create_service_thread("verity-on", set_verity_enabled_state_service,
                                     reinterpret_cast<void*>(0));
@@ -325,8 +325,7 @@
         ret = create_service_thread("verity-off", set_verity_enabled_state_service,
                                     reinterpret_cast<void*>(1));
     } else if (!strcmp(name, "reconnect")) {
-        ret = create_service_thread("reconnect", reconnect_service,
-                                    const_cast<atransport*>(transport));
+        ret = create_service_thread("reconnect", reconnect_service, transport);
 #endif
     }
     if (ret >= 0) {