react-native-keychain fork update

[ovitrif]

Task to update fork of react-native-keychain on the latest version of the original library.

Reason is to fix slow startup related to Android Strongbox, the main issue is tracked here:

• Cold start on android took 5-10 seconds longer than before the library update oblador/react-native-keychain#630

Will also address:

• [Bug]: Hot reloading on Android broken #1916

Might need multiple PRs, as the actual delay at startup isn't really fixed yet in the library, but since the code is converted to Kotlin it's possible to fix the hot reload.

PRs:

• Sync with updated fork PR for on top of origin react-native-keychain#2

[ovitrif]

Moving this to in review, will create a new issue if there's new changes upstream.

Going this route since my PR for original library might also get merged sooner, so in best case scenario we can switch back to use the library.