android: OTA fallback using the browser

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

frontend/ui/otamanager.lua

@@ -261,11 +261,18 @@ function OTAManager:fetchAndProcessUpdate()
                 ok_callback = function()
                     local isAndroid, android = pcall(require, "android")
                     if isAndroid then
-                        -- download the package if not present.
-                        if android.download(link, ota_package) then
-                            android.notification(T(_("The file %1 already exists."), BD.filename(ota_package)))
+                        -- try to download the package
+                        local ok = android.download(link, ota_package)
+                        if ok == 1 then
+                            android.notification(T(_("The file %1 already exists."), ota_package))
+                        elseif ok == 0 then
+                            android.notification(T(_("Downloading %1"), ota_package))
                         else
-                            android.notification(T(_("Downloading %1"), BD.filename(ota_package)))
+                            UIManager:show(ConfirmBox:new{
+                                text = _("Your device seems to be unable to download packages.\nRetry using the browser?"),
+                                ok_text = _("Retry"),
+                                ok_callback = function() Device:openLink(link) end,
+                            })
                         end
                     elseif Device:isSDL() then
                         Device:openLink(link)

platform/android/luajit-launcher

@@ -1 +1 @@
-Subproject commit e06b1089daeca0e663690cc0aa75ecbbdfb4f22e
+Subproject commit 37ad1e4aca9e8e2a97b36ad4796b8c897da75cbc