Added login optional debug logs. (#61)

app/src/main/res/layout/switch_item.xml

@@ -0,0 +1,11 @@
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <Switch
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerHorizontal="true"
+        android:layout_centerVertical="true" />
+</RelativeLayout>

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

@@ -2,6 +2,14 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto">
 
+    <item
+        android:id="@+id/loging_debug"
+        android:checkable="true"
+        android:checked="false"
+        android:icon="@drawable/ic_bug_report"
+        android:title="@string/login_menu_debug"
+        app:showAsAction="never" />
+
     <item android:id="@+id/about"
           android:title="@string/action_about"
           android:orderInCategory="102"

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

@@ -131,4 +131,9 @@
     <string name="blue_amber_dark_theme">Bleu/Ambre/Foncé</string>
     <string name="indigo_pink_dark_theme">Indigo/Rose/Foncé</string>
     <string name="red_teal_dark_theme">Rouge/Sarcelle/Foncé</string>
+    <string name="pref_header_debug">Debug</string>
+    <string name="login_debug_title">Activez pour loguer toutes les erreurs de conexion</string>
+    <string name="login_debug_on">Toutes les erreurs de connexion vont être loguées</string>
+    <string name="login_debug_off">Aucune erreur de connexion ne sera loguée</string>
+    <string name="login_menu_debug">Debug</string>
 </resources>

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

@@ -131,4 +131,9 @@
     <string name="blue_amber_dark_theme">Blue/Amber/Dark</string>
     <string name="indigo_pink_dark_theme">Indigo/Pink/Dark</string>
     <string name="red_teal_dark_theme">Red/Teal/Dark</string>
+    <string name="pref_header_debug">Debug</string>
+    <string name="login_debug_title">Activate to log login errors</string>
+    <string name="login_debug_on">Any error on the login page will be logged</string>
+    <string name="login_debug_off">No log on the login page</string>
+    <string name="login_menu_debug">Debug</string>
 </resources>

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

@@ -133,4 +133,9 @@
     <string name="blue_amber_dark_theme">Blue/Amber/Dark</string>
     <string name="indigo_pink_dark_theme">Indigo/Pink/Dark</string>
     <string name="red_teal_dark_theme">Red/Teal/Dark</string>
+    <string name="pref_header_debug">Debug</string>
+    <string name="login_debug_title">Activate to log login errors</string>
+    <string name="login_debug_on">Any error on the login page will be logged</string>
+    <string name="login_debug_off">No log on the login page</string>
+    <string name="login_menu_debug">Debug</string>
 </resources>

app/src/main/res/xml/pref_debug.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <SwitchPreference
+        android:defaultValue="false"
+        android:key="loging_debug"
+        android:summaryOff="@string/login_debug_off"
+        android:summaryOn="@string/login_debug_on"
+        android:title="@string/login_debug_title" />
+</PreferenceScreen>

app/src/main/res/xml/pref_headers.xml

@@ -5,6 +5,11 @@
         android:icon="@drawable/ic_settings_black_24dp"
         android:title="@string/pref_header_general"/>
 
+    <header
+        android:fragment="apps.amine.bou.readerforselfoss.settings.SettingsActivity$DebugPreferenceFragment"
+        android:icon="@drawable/ic_bug_report"
+        android:title="@string/pref_header_debug"/>
+
     <header
         android:id="@+id/theme_change"
         android:icon="@drawable/ic_color_lens_black_24dp"