Android: Re-add generate_apk alias for compatibility

Author: akien-mga

platform/android/detect.py

@@ -35,7 +35,7 @@ def get_opts():
         ),
         BoolVariable("store_release", "Editor build for Google Play Store (for official builds only)", False),
         BoolVariable(
-            "generate_android_binaries",
+            ("generate_android_binaries", "generate_apk"),
             "Generate APK, AAB & AAR binaries after building Android library by calling Gradle",
             False,
         ),