Move versionCode/versionName into build.gradle (instead of

AndroidManifest), because that's apparently how it should be done these
days.

app/build.gradle

@@ -26,6 +26,9 @@ android {
         applicationId "org.galexander.sshd"
         minSdkVersion 17
         targetSdkVersion 30
+
+        versionCode 24
+        versionName "24"
     }
 
     buildTypes {

app/src/main/AndroidManifest.xml

@@ -1,8 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-      package="org.galexander.sshd"
-      android:versionCode="24"
-      android:versionName="24">
+      package="org.galexander.sshd">
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />