fix: inability to disable hermesV1 on Android (#55399)

Summary:
Changing the line in `ReactPlugin.kt` that always set `hermesV1Enabled` to `true` even if it was explicitly disabled, accidentally omitted in https://github.com/facebook/react-native/issues/54989.

In recent update of hermes V1 binary a file `RuntimeAdapter.h` was removed.

## Changelog:

[ANDROID] [FIXED] - ReactPlugin.kt always setting `hermesV1Enabled` to `true`

Pull Request resolved: https://github.com/facebook/react-native/pull/55399

Test Plan: Build React Native from source on latest 0.84 RC, disable hermesV1 and see that it compiles now.

Reviewed By: cipolleschi

Differential Revision: D92267385

Pulled By: cortinico

fbshipit-source-id: 58ecae6d3064995ef9e63ddbd67ac04db2a1126b