Store session data in a secure way (#98)

* Replace SessionData DataStore with an encrypted SQLite DB.

---------

Co-authored-by: Benoit Marty <benoit@matrix.org>

samples/minimal/src/main/res/values-night/themes.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (c) 2023 New Vector Ltd
+  ~
+  ~ 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.
+  -->
+
+<resources>
+    <style name="Theme.ElementX" parent="android:Theme.Material.NoActionBar" />
+</resources>

samples/minimal/src/main/res/values/themes.xml

@@ -16,6 +16,5 @@
   -->
 
 <resources>
-
     <style name="Theme.ElementX" parent="android:Theme.Material.Light.NoActionBar" />
 </resources>