Revert "Split adb_main.cpp into client and daemon."

This reverts commit cf07494ac2a101c3afbe23a7d85121553f586cf7.
diff --git a/adb/adb.cpp b/adb/adb.cpp
index c4e3434..9abcc73 100644
--- a/adb/adb.cpp
+++ b/adb/adb.cpp
@@ -796,12 +796,13 @@
     return 0;
 }
 
-int handle_host_request(const char* service, TransportType type,
-                        const char* serial, int reply_fd, asocket* s) {
-    if (strcmp(service, "kill") == 0) {
-        fprintf(stderr, "adb server killed by remote request\n");
+int handle_host_request(const char* service, TransportType type, const char* serial, int reply_fd, asocket *s)
+{
+    if(!strcmp(service, "kill")) {
+        fprintf(stderr,"adb server killed by remote request\n");
         fflush(stdout);
         SendOkay(reply_fd);
+        usb_cleanup();
         exit(0);
     }