This is recommended as a best practice, though AFAIK this only matters
for projects that are going to be imported by other projects.
For instance, you used to be able to include `:deps:extension-api` by
including any extension that depended on it. Now, every project that
wants to use `extension-api` has to include it directly. (Which is fine
because in practice, they all already do so.)
https://developer.android.com/studio/projects/configure-agp-ndk#agp_version_41
The documentation tells you to be careful about this, since you're
putting local-only information into a file that gets uploaded to version
control, but Lime doesn't really need to worry about that.
Granted, Lime DID use local.properties, but that's no longer practical.
Otherwise it throws the following error on build:
"Apps targeting Android 12 and higher are required to specify an explicit value for `android:exported` when the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details."
To publish apps on Google Play everyone needs to target SDK 31+, which is Android 12+, so this is like a must now.
If "true", the activity is accessible to any app, and is launchable by its exact class name.
If "false", the activity can be launched only by components of the same application, applications with the same user ID, or privileged system components. This is the default value when there are no intent filters.
Problem one: it requires its own binary, which we haven't built. There
are instructions in sdl/src/hidapi/README.txt, if we ever want to try.
Problem two: the Android app segfaults when `hid_init()` calls
`g_JVM->AttachCurrentThread()`. This might be a bug in NDK 21's jni.h,
but that seems unlikely. Perhaps a version mismatch?
In any case, we aren't using the code at the moment, so the easy answer
is to leave it out.
On Android, `SDL_RWops` no longer stores a plain file descriptor,
so the `AAsset` API must be used instead:
https://developer.android.com/ndk/reference/group/asset
`HAVE_INOTIFY` is required on Linux at the moment, but the bug will be
fixed in the next SDL release.
