[android] Fix default app theme

We can now againn use the NoTitleBar theme since we are not using alert
messagse from the main activity

android-project/app/src/main/AndroidManifest.xml

@@ -29,18 +29,19 @@
 
     <!-- TODO: Remove this after November 2021 -->
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <!-- Required for downloading shareware data on older devices -->
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="22" />
     <!-- Allow access to Bluetooth devices -->
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <!-- Allow access to the vibrator -->
     <uses-permission android:name="android.permission.VIBRATE" />
-    <!-- Allow access to the network for multiplayer -->
+    <!-- Allow access to the network for multiplayer and demo download -->
     <uses-permission android:name="android.permission.INTERNET" />
-    <!-- Required for downloading shareware data on older devices -->
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:maxSdkVersion="22" />
 
     <application android:label="@string/app_name"
         android:icon="@mipmap/ic_launcher"
         android:allowBackup="true"
+        android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
         android:hardwareAccelerated="true"
         android:requestLegacyExternalStorage="true">