Summary:
Due to an update to react-native on the android tv platform tapping the select button on a remote calls the onPress prop twice for `TouchableHighlight`, `TouchableOpacity`, and `TouchableWithoutFeedback`. This is happening because touchableHandlePress gets called from two places. First from the onClick prop in the touchable component and second from the TVEventHandler in the TouchableMixin.
## Changelog
[Android] [Fixed] - Adds a not android check to the select case of the TVEventHandler callback in the TouchableMixin.
Pull Request resolved: https://github.com/facebook/react-native/pull/26474
Test Plan:
Confirmed on Android Tv and Apple Tv
1) Add a TouchableOpacity to a screen with an onPress callback
2) Run app
3) Focus the TouchableOpacity
4) Press the Select Button on the Remote
**Expected Results**
onPress is called once
Differential Revision: D17530170
Pulled By: TheSavior
fbshipit-source-id: b776faba477c6231ad296abd21f072335dca5556