Fix Android relaunch hang after destroy while paused (#6040)

When the activity is destroyed while the app is paused, PollInputEvents
kept looping after setting CORE.Window.shouldClose: while paused,
ALooper_pollAll is called with an infinite timeout (-1), so on the next
iteration it blocked forever waiting for an event that never arrives.
main() never returned, the native thread stayed alive, and the following
launch hung inheriting that thread.

src/platforms/rcore_android.c

@@ -801,6 +801,7 @@ void PollInputEvents(void)
         if (platform.app->destroyRequested != 0)
         {
             CORE.Window.shouldClose = true;
+            break;
         }
     }
 }