fix(android): keep Gen1 Game.load after in-process EXIT GAME

Stop fanning out arbitrary field:release() during Game/Game2 reset — shared
modules use :release as a handle API, and that teardown left the Gen1
singleton unbootable (Game:load nil) on Play-again. Harden bootGame and
endGameSession to rebuild the module if load is missing.

src/core/SessionLifecycle.lua

@@ -87,6 +87,13 @@ function SessionLifecycle.endGameSession(game)
   if game and game.reset then
     pcall(function() game:reset() end)
   end
+  -- Gen1 Game is the module singleton.  If teardown left it without load,
+  -- drop the cached module so the next require rebuilds a clean table
+  -- (bootGame also guards this; doing it here keeps Play-again reliable).
+  if game and type(game.load) ~= "function"
+      and package.loaded["src.core.Game"] == game then
+    package.loaded["src.core.Game"] = nil
+  end
 
   local Input = require("src.core.Input")
   local TouchControls = require("src.core.TouchControls")