android: call EPD test from within KOReader (#5737)

* android: call EPD test from within KOReader

Co-Authored-By: Frans de Jonge <fransdejonge@gmail.com>

frontend/apps/filemanager/filemanagermenu.lua

@@ -387,6 +387,15 @@ function FileManagerMenu:setUpdateItemTable()
             end,
         })
     end
+    if Device:isAndroid() then
+        table.insert(self.menu_items.developer_options.sub_item_table, {
+            text = _("Start E-ink test"),
+            callback = function()
+                Device:epdTest()
+            end,
+        })
+    end
+
     table.insert(self.menu_items.developer_options.sub_item_table, {
         text = _("Disable enhanced UI text shaping (xtext)"),
         checked_func = function()

frontend/device/android/device.lua

@@ -312,6 +312,10 @@ function Device:info()
     return common_text..eink_text..wakelocks_text
 end
 
+function Device:epdTest()
+    android.einkTest()
+end
+
 function Device:exit()
     android.LOGI(string.format("Stopping %s main activity", android.prop.name));
     android.lib.ANativeActivity_finish(android.app.activity)