feat: store and export measurements locally

app/src/main/res/menu/menu_main.xml

@@ -3,8 +3,8 @@
     xmlns:tools="http://schemas.android.com/tools"
     tools:context="com.example.sensortestingapp.MainActivity">
     <item
-        android:id="@+id/action_settings"
+        android:id="@+id/action_export"
         android:orderInCategory="100"
-        android:title="@string/action_settings"
+        android:title="@string/action_export"
         app:showAsAction="never" />
 </menu>

app/src/main/res/values/strings.xml

@@ -1,6 +1,6 @@
 <resources>
     <string name="app_name">Sensor Testing App</string>
-    <string name="action_settings">Settings</string>
+    <string name="action_export">Export to csv</string>
     <!-- Strings used for fragments for navigation -->
     <string name="first_fragment_label">First Fragment</string>
     <string name="second_fragment_label">Second Fragment</string>

app/src/main/res/xml/provider_paths.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <files-path
+        name="files"
+        path="."/>
+
+    <external-path
+        name="external_files"
+        path="."/>
+</paths>