feat: background sync even if interval not passed

this avoids the scenario of:
1. study some cards
2. leave the app within a time less than 10 minutes (so autosync isn't triggered)
3. open the app again and have the wait the studied cards in `1.` to be synced, although they could have been already synced in the background

that also indirectly makes media sync to run in every app startup. Not sure if that should be kept or avoided

AnkiDroid/src/main/java/com/ichi2/anki/DeckPicker.kt

@@ -1239,7 +1239,7 @@ open class DeckPicker :
             !isAutoSyncEnabled -> Timber.d("autoSync: not enabled")
             isBlockedByMeteredConnection -> Timber.d("autoSync: blocked by metered connection")
             !NetworkUtils.isOnline -> Timber.d("autoSync: offline")
-            !syncIntervalPassed() -> Timber.d("autoSync: sync interval not passed")
+            !runInBackground && !syncIntervalPassed() -> Timber.d("autoSync: interval not passed")
             !isLoggedIn() -> Timber.d("autoSync: not logged in")
             mediaMigrationIsInProgress(this) -> Timber.d("autoSync: migrating storage")
             !areThereChangesToSync() -> {