fix: f-droid build warnings

app/build.gradle.kts

@@ -30,6 +30,14 @@ android {
         vectorDrawables {
             useSupportLibrary = true
         }
+        javaCompileOptions {
+            annotationProcessorOptions {
+                arguments += mapOf(
+                    "room.schemaLocation" to "$projectDir/schemas",
+                    "room.incremental" to "true"
+                )
+            }
+        }
     }
 
     buildTypes {

app/src/main/java/com/zaneschepke/wireguardautotunnel/repository/AppDatabase.kt

@@ -6,7 +6,7 @@ import androidx.room.TypeConverters
 import com.zaneschepke.wireguardautotunnel.repository.model.Settings
 import com.zaneschepke.wireguardautotunnel.repository.model.TunnelConfig
 
-@Database(entities = [Settings::class, TunnelConfig::class], version = 1)
+@Database(entities = [Settings::class, TunnelConfig::class], version = 1, exportSchema = true)
 @TypeConverters(DatabaseListConverters::class)
 abstract class AppDatabase : RoomDatabase() {
     abstract fun settingDao(): SettingsDoa

app/src/main/java/com/zaneschepke/wireguardautotunnel/service/tile/TunnelControlTile.kt

@@ -81,13 +81,18 @@ class TunnelControlTile : TileService() {
     private suspend fun determineTileTunnel() : TunnelConfig? {
         var tunnelConfig : TunnelConfig? = null;
         val settings = settingsRepo.getAll()
-        if (!settings.isNullOrEmpty()) {
+        if (settings.isNotEmpty()) {
             val setting = settings.first()
             tunnelConfig = if (setting.defaultTunnel != null) {
                 TunnelConfig.from(setting.defaultTunnel!!);
             } else {
-                val config = configRepo.getAll()?.first();
-                config;
+                val configs = configRepo.getAll();
+                val config  = if(configs.isNotEmpty()) {
+                    configs.first();
+                } else {
+                    null
+                }
+                config
             }
         }
         return tunnelConfig;
@@ -97,7 +102,7 @@ class TunnelControlTile : TileService() {
     private fun attemptWatcherServiceToggle(tunnelConfig : String) {
         scope.launch {
             val settings = settingsRepo.getAll()
-            if (!settings.isNullOrEmpty()) {
+            if (settings.isNotEmpty()) {
                 val setting = settings.first()
                 if(setting.isAutoTunnelEnabled) {
                     ServiceManager.toggleWatcherServiceForeground(this@TunnelControlTile, tunnelConfig)