Also show TikTok in Backup status

The apps ships an instrumentation configuration which we've so far only soon for instrumentation test dev apps. Now, we do more checks to identify those.

app/src/main/java/com/stevesoltys/seedvault/transport/backup/PackageService.kt

@@ -232,7 +232,11 @@ internal class PackageService(
 
 internal fun PackageInfo.isUserVisible(context: Context): Boolean {
     if (packageName == MAGIC_PACKAGE_MANAGER || applicationInfo == null) return false
-    return !isNotUpdatedSystemApp() && instrumentation == null && packageName != context.packageName
+    val isInstrumentationApp = instrumentation.let { i ->
+        // TikTok for example ships instrumentation, so do more checks. See #769
+        !i.isNullOrEmpty() && packageName.endsWith(".test") && i[0].splitNames.isEmpty()
+    }
+    return !isNotUpdatedSystemApp() && !isInstrumentationApp && packageName != context.packageName
 }
 
 internal fun PackageInfo.isSystemApp(): Boolean {