Added backup receivers

app/src/main/kotlin/com/simplemobiletools/notes/pro/receivers/AutomaticBackupReceiver.kt

@@ -0,0 +1,16 @@
+package com.simplemobiletools.notes.pro.receivers
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.os.PowerManager
+
+class AutomaticBackupReceiver : BroadcastReceiver() {
+
+    override fun onReceive(context: Context, intent: Intent) {
+        val powerManager = context.getSystemService(Context.POWER_SERVICE) as PowerManager
+        val wakelock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "simplenotes:automaticbackupreceiver")
+        wakelock.acquire(3000)
+        context.backupNotes()
+    }
+}

app/src/main/kotlin/com/simplemobiletools/notes/pro/receivers/BootCompletedReceiver.kt

@@ -0,0 +1,17 @@
+package com.simplemobiletools.notes.pro.receivers
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import com.simplemobiletools.commons.helpers.ensureBackgroundThread
+
+class BootCompletedReceiver : BroadcastReceiver() {
+
+    override fun onReceive(context: Context, intent: Intent) {
+        ensureBackgroundThread {
+            context.apply {
+                checkAndBackupNotesOnBoot()
+            }
+        }
+    }
+}