Clean up the server from temporary folder

The server is copied to /data/local/tmp/scrcpy-server.jar and executed
on the device.

As soon as we are connected, we can unlink (rm) it from /data/local/tmp,
to keep the device clean.

app/src/command.c

@@ -66,6 +66,11 @@ process_t adb_push(const char *serial, const char *local, const char *remote) {
     return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
 }
 
+process_t adb_remove_path(const char *serial, const char *path) {
+    const char *const adb_cmd[] = {"shell", "rm", path};
+    return adb_execute(serial, adb_cmd, ARRAY_LEN(adb_cmd));
+}
+
 SDL_bool process_check_success(process_t proc, const char *name) {
     if (proc == PROCESS_NONE) {
         LOGE("Could not execute \"%s\"", name);