Attempt to fix for Android's sys.platform changes (#3359)

* Attempt to fix for Android

* Add a newsfragment

Author: A5rocks

newsfragments/3357.bugfix.rst

@@ -0,0 +1 @@
+Start supporting Android's new ``"android"`` `sys.platform`.

src/trio/_core/__init__.py

@@ -86,9 +86,9 @@
         write_overlapped,
     )
 # Kqueue imports
-if (sys.platform != "linux" and sys.platform != "win32") or (
-    not _t.TYPE_CHECKING and "sphinx.ext.autodoc" in sys.modules
-):
+if (
+    sys.platform != "linux" and sys.platform != "win32" and sys.platform != "android"
+) or (not _t.TYPE_CHECKING and "sphinx.ext.autodoc" in sys.modules):
     from ._run import current_kqueue, monitor_kevent, wait_kevent
 
 del sys  # It would be better to import sys as _sys, but mypy does not understand it

src/trio/_core/_run.py

@@ -3113,7 +3113,11 @@ def in_trio_task() -> bool:
         WindowsIOManager as TheIOManager,
         _WindowsStatistics as IOStatistics,
     )
-elif sys.platform == "linux" or (not TYPE_CHECKING and hasattr(select, "epoll")):
+elif (
+    sys.platform == "linux"
+    or sys.platform == "android"
+    or (not TYPE_CHECKING and hasattr(select, "epoll"))
+):
     from ._generated_io_epoll import *
     from ._io_epoll import (
         EpollIOManager as TheIOManager,