Add support for archiving conversations

Archiving messages currently acts like recycle bin in
Simple Gallery, meaning that after 30 days, conversations
will be deleted permanently. Any updates to the conversation
(new messages) removes it from archive.

This closes #177

app/src/main/kotlin/com/simplemobiletools/smsmessenger/dialogs/DeleteConfirmationDialog.kt

@@ -0,0 +1,39 @@
+package com.simplemobiletools.smsmessenger.dialogs
+
+import android.app.Activity
+import androidx.appcompat.app.AlertDialog
+import com.simplemobiletools.commons.extensions.beGoneIf
+import com.simplemobiletools.commons.extensions.getAlertDialogBuilder
+import com.simplemobiletools.commons.extensions.setupDialogStuff
+import com.simplemobiletools.smsmessenger.R
+import kotlinx.android.synthetic.main.dialog_delete_confirmation.view.delete_remember_title
+import kotlinx.android.synthetic.main.dialog_delete_confirmation.view.skip_the_recycle_bin_checkbox
+
+class DeleteConfirmationDialog(
+    private val activity: Activity,
+    private val message: String,
+    private val showSkipRecycleBinOption: Boolean,
+    private val callback: (skipRecycleBin: Boolean) -> Unit
+) {
+
+    private var dialog: AlertDialog? = null
+    val view = activity.layoutInflater.inflate(R.layout.dialog_delete_confirmation, null)!!
+
+    init {
+        view.delete_remember_title.text = message
+        view.skip_the_recycle_bin_checkbox.beGoneIf(!showSkipRecycleBinOption)
+        activity.getAlertDialogBuilder()
+            .setPositiveButton(R.string.yes) { _, _ -> dialogConfirmed() }
+            .setNegativeButton(R.string.no, null)
+            .apply {
+                activity.setupDialogStuff(view, this) { alertDialog ->
+                    dialog = alertDialog
+                }
+            }
+    }
+
+    private fun dialogConfirmed() {
+        dialog?.dismiss()
+        callback(view.skip_the_recycle_bin_checkbox.isChecked)
+    }
+}