Revert "GameActivity PATCH: Rename android_main _rust_glue_entry"

This reverts commit 202ab4c.

Author: jb55

android-activity/game-activity-csrc/game-activity/native_app_glue/android_native_app_glue.c

@@ -233,7 +233,7 @@ static void* android_app_entry(void* param) {
     pthread_cond_broadcast(&android_app->cond);
     pthread_mutex_unlock(&android_app->mutex);
 
-    _rust_glue_entry(android_app);
+    android_main(android_app);
 
     android_app_destroy(android_app);
     return NULL;

android-activity/game-activity-csrc/game-activity/native_app_glue/android_native_app_glue.h

@@ -448,10 +448,10 @@ void android_app_clear_motion_events(struct android_input_buffer* inputBuffer);
 void android_app_clear_key_events(struct android_input_buffer* inputBuffer);
 
 /**
- * This is a springboard into the Rust glue layer that wraps calling the
- * main entry for the app itself.
+ * This is the function that application code must implement, representing
+ * the main entry to the app.
  */
-extern void _rust_glue_entry(struct android_app* app);
+extern void android_main(struct android_app* app);
 
 /**
  * Set the filter to use when processing key events.