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/ha_adb_common/adb_client.py

@@ -174,6 +174,14 @@ class AdbClientBase:
             _LOGGER.debug("ADB digit keyevent %d (%s)", 7 + int(digit), digit)
         return result is not None
 
+    async def send_enter_keyevent(self) -> bool:
+        """Send ENTER via `input keyevent` (KEYCODE_ENTER = 66) — the ENTER
+        fallback for the §7 channel sequence."""
+        result = await self.shell("input keyevent 66")
+        if result is not None:
+            _LOGGER.debug("ADB ENTER keyevent (66)")
+        return result is not None
+
     async def bring_to_foreground(self, package: str) -> bool:
         """Bring an app to the foreground using monkey command."""
         result = await self.shell(