set android:exported="false" if this is required
set android:exported="false" if this is required

fixes #12354

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.

We already set `android:exported="true"` if this is necessary.
Therefore I assume that all others should be set to `false`.

tobiasge/cgeo,cgeo/cgeo,cgeo/cgeo,tobiasge/cgeo,cgeo/cgeo,cgeo/cgeo,tobiasge/cgeo