fix: jsi no template error

[dcangulo]

Summary

error Failed to install the app. Command failed with exit code 1: ./gradlew app:installDebug -PreactNativeDevServerPort=8081
Execution failed for task ':react-native-pkce-challenge:buildCMakeDebug[arm64-v8a]'.
mobile/android/../node_modules/react-native/ReactCommon/jsi/jsi/jsi.h:1107:23 error: no template named 'enable_if_t' in namespace 'std'; did you mean 'enable_if'? typename = std::enable_if_t< ~~~~~^~~~~~~~~~~ enable_if

enable_if_t is used by JSI: https://github.com/facebook/react-native/blob/main/packages/react-native/ReactCommon/jsi/jsi/jsi.h#L1122

According to https://stackoverflow.com/questions/64281680/error-no-template-named-enable-if-t-in-namespace-std-did-you-mean-enable, the fix is to use C++14 or newer.

React Native JSI itself uses C++14: https://github.com/facebook/react-native/blob/main/packages/react-native/ReactCommon/jsi/jsi/CMakeLists.txt#L6

Test plan

Green CI.

[satya164]

Thank you