Raise min sdk for background sync

Author: simolus3

demos/supabase-todolist/androidBackgroundSync/build.gradle.kts

@@ -12,7 +12,7 @@ android {
 
     defaultConfig {
         applicationId = "com.powersync.demo.backgroundsync"
-        minSdk = libs.versions.android.minSdk.get().toInt()
+        minSdk = 28
         targetSdk = libs.versions.android.targetSdk.get().toInt()
         versionCode = 1
         versionName = "1.0"