[expo] fix NoSuchMethodException on getReactHost for r8

[Kudo]

Why

fixes updates e2e crash on android when R8 is enabled: https://expo.dev/accounts/expo-ci/projects/updates-e2e/builds/592e06b7-b9b1-4a72-9f24-f55c9ea9d532

   @Thread DefaultDispatcher-worker-2(41):
    java.lang.NoSuchMethodException: com.facebook.react.r.getReactHost []
    	at java.lang.Class.getMethod(Class.java:2103)
    	at java.lang.Class.getDeclaredMethod(Class.java:2081)
    	at a5.g.w(SourceFile:1)
    	at a5.g.s(SourceFile:1)
    	at a5.g$a.a(SourceFile:1)
    	at a5.g$a.invoke(SourceFile:1)
    	at m7.s.getValue(SourceFile:1)
    	at a5.g.u(SourceFile:1)
    	at a5.g.t(SourceFile:1)
    	at a5.g.y(SourceFile:1)
    	at a5.g.p(SourceFile:1)
    	at a5.f.run(SourceFile:1)
    	at expo.modules.updates.UpdatesPackage$c$b.invokeSuspend(Unknown Source:12)
    	at kotlin.coroutines.jvm.internal.a.resumeWith(Unknown Source:11)
    	at la.s0.run(SourceFile:1)
    	at android.os.Handler.handleCallback(Handler.java:938)
    	at android.os.Handler.dispatchMessage(Handler.java:99)
    	at android.os.Looper.loopOnce(Looper.java:201)
    	at android.os.Looper.loop(Looper.java:288)
    	at android.app.ActivityThread.main(ActivityThread.java:7839)
    	at java.lang.reflect.Method.invoke(Native Method)
    	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
    	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
    	Suppressed: la.q0: [a2{Cancelling}@94e852b, Dispatchers.IO]

How

the getReactHost is a public method and we don't keep name for public method. we could call the method directly without reflection.

Test Plan

updates e2e ci passed

Checklist

• Documentation is up to date to reflect these changes (eg: https://docs.expo.dev and README.md).
• Conforms with the Documentation Writing Style Guide
• This diff will work correctly for npx expo prebuild & EAS Build (eg: updated a module plugin).

[expo-bot]

The Pull Request introduced fingerprint changes against the base commit: 796d42a

Fingerprint diff

[
  {
    "type": "dir",
    "filePath": "../../packages/expo/android",
    "reasons": [
      "expoAutolinkingAndroid"
    ],
    "hash": "8bf80ecfa75599955d943ce3dde54bd5bc6e80aa"
  }
]

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