chore(android): add utils class

android/app/src/main/java/com/vernu/sms/TextBeeUtils.java

@@ -0,0 +1,53 @@
+package com.vernu.sms;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.telephony.SubscriptionInfo;
+import android.telephony.SubscriptionManager;
+
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
+import com.vernu.sms.services.StickyNotificationService;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TextBeeUtils {
+    public static boolean isPermissionGranted(Context context, String permission) {
+        return ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED;
+    }
+
+    public static List<SubscriptionInfo> getAvailableSimSlots(Context context) {
+
+        if (ActivityCompat.checkSelfPermission(context, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
+            return new ArrayList<>();
+        }
+
+        SubscriptionManager subscriptionManager = SubscriptionManager.from(context);
+        return subscriptionManager.getActiveSubscriptionInfoList();
+
+    }
+
+    public static void startStickyNotificationService(Context context) {
+
+        if(!isPermissionGranted(context, Manifest.permission.RECEIVE_SMS)){
+            return;
+        }
+
+        Intent notificationIntent = new Intent(context, StickyNotificationService.class);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            context.startForegroundService(notificationIntent);
+        } else {
+            context.startService(notificationIntent);
+        }
+    }
+
+    public static void stopStickyNotificationService(Context context) {
+        Intent notificationIntent = new Intent(context, StickyNotificationService.class);
+        context.stopService(notificationIntent);
+    }
+}