initial Log Display function

OpenKeychain/src/main/res/menu/log_display.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/menu_log_display_export_log"
+        android:icon="@drawable/ic_action_save_white"
+        android:title="@string/menu_export_log"
+        app:showAsAction="ifRoom|withText" />
+
+</menu>

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

@@ -42,6 +42,7 @@
     <string name="title_exchange_keys">"Exchange Keys"</string>
     <string name="title_advanced_key_info">"Advanced Key Info"</string>
     <string name="title_keys">"Keys"</string>
+    <string name="title_export_log">"Export Log"</string>
 
     <!-- section -->
     <string name="section_user_ids">"Identities"</string>
@@ -106,6 +107,7 @@
     <string name="menu_search_cloud">"Search cloud"</string>
     <string name="menu_export_all_keys">"Export all keys"</string>
     <string name="menu_advanced">"Show advanced info"</string>
+    <string name="menu_export_log">"Export Log"</string>
 
     <!-- label -->
     <string name="label_message">"Message"</string>
@@ -237,6 +239,8 @@
     <string name="key_creation_el_gamal_info">"Note: only subkeys support ElGamal."</string>
     <string name="key_not_found">"Couldn't find key %08X."</string>
 
+    <string name="specify_file_to_export_log_to">"Please specify file to export to. \nWARNING: File will be overwritten if it exists."</string>
+
     <plurals name="bad_keys_encountered">"
         <item quantity="one">"%d bad secret key ignored. Perhaps you exported with the option\n --export-secret-subkeys\nMake sure you export with\n --export-secret-keys\ninstead.""</item>
         <item quantity="other">"%d bad secret keys ignored. Perhaps you exported with the option\n --export-secret-subkeys\nMake sure you export with\n --export-secret-keys\ninstead.""</item>