Fix build failures for Android on Windows

The issue is caused by https://github.com/godotengine/godot/pull/64306 which makes use of a 3.7 feature while the current recommended python version is 3.5 for 3.x and 3.6 for master.

methods.py

@@ -412,16 +412,17 @@ def use_windows_spawn_fix(self, platform=None):
 
         startupinfo = subprocess.STARTUPINFO()
         startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
-        proc = subprocess.Popen(
-            cmdline,
-            stdin=subprocess.PIPE,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE,
-            startupinfo=startupinfo,
-            shell=False,
-            env=env,
-            text=True,
-        )
+        popen_args = {
+            "stdin": subprocess.PIPE,
+            "stdout": subprocess.PIPE,
+            "stderr": subprocess.PIPE,
+            "startupinfo": startupinfo,
+            "shell": False,
+            "env": env,
+        }
+        if sys.version_info >= (3, 7, 0):
+            popen_args["text"] = True
+        proc = subprocess.Popen(cmdline, **popen_args)
         _, err = proc.communicate()
         rv = proc.wait()
         if rv: