fix: flow VERSION=2 for new entries; optional ENTER gains the ADB keyevent-66 fallback; CI installs androidtvremote2 for the real-library tests (F4, F5, F6)

custom_components/nvidia_shield/connection.py

@@ -451,6 +451,12 @@ class ShieldConnectionManager:
             return False
         return await self._poller.send_digit_keyevent(digit)
 
+    async def send_enter_key(self) -> bool:
+        """ENTER via the ADB keyevent path (KEYCODE_ENTER = 66, §7 fallback)."""
+        if not self.available:
+            return False
+        return await self._poller.send_enter_keyevent()
+
     # ── Lifecycle ──
 
     async def async_start(self) -> None: