fix: Add build script and fix manifest

- Add build-apk.sh for easy compilation
- Simplify AndroidManifest.xml
- Fix themes.xml to use basic Android themes
- Enable BuildConfig
- Add okhttp-dnsoverhttps dependency

android-sdk/platforms/android-34/data/res/drawable/messaging_user.xml

@@ -0,0 +1,28 @@
+<!--
+Copyright (C) 2014 The Android Open Source Project
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="192.0"
+        android:viewportWidth="192.0">
+    <path android:fillColor="#000000"
+          android:fillAlpha="0.125"
+          android:pathData="M96,0C43.01,0 0,43.01 0,96s43.01,96 96,96s96,-43.01 96,-96S148.99,0 96,0z"/>
+    <path android:fillColor="#BDBDBD"
+          android:pathData="M96,85.09c13.28,0 24,-10.72 24,-24c0,-13.28 -10.72,-24 -24,-24s-24,10.72 -24,24C72,74.37 82.72,85.09 96,85.09z"/>
+    <path android:fillColor="#BDBDBD"
+          android:pathData="M96,99.27c-29.33,0 -52.36,14.18 -52.36,27.27c11.09,17.06 30.51,28.36 52.36,28.36s41.27,-11.3 52.36,-28.36C148.36,113.45 125.33,99.27 96,99.27z"/>
+</vector>