Added redirection from AccountsActivity to MainActivity

Signed-off-by: Arnau Mora <[email protected]>

Author: ArnyminerZ

Diff for: app/src/main/AndroidManifest.xml

@@ -70,6 +70,14 @@
             </intent-filter>
         </activity>
 
+        <!--
+        Left here for external apps.
+        Automatically redirects to MainActivity.
+        Should be removed in the future.
+        -->
+        <!--suppress DeprecatedClassUsageInspection -->
+        <activity android:name=".ui.AccountsActivity" android:exported="true" />
+
         <activity
             android:name=".ui.AboutActivity"
             android:label="@string/navigation_drawer_about"

Diff for: app/src/main/kotlin/at/bitfire/davdroid/ui/AccountsActivity.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.ui
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+
+@Deprecated("Automatically redirects to MainActivity. Should be removed in the future.")
+class AccountsActivity: AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        startActivity(
+            Intent(this, MainActivity::class.java).apply {
+                action = intent.action
+            }
+        )
+    }
+}