Re-enable development tools for Android

[ide]

In this commit b523067 we comment out accessing member variables named DEBUG_SERVER_HOST_PORT and INSPECTOR_PROXY_PORT because they have been replaced by methods. This task is to update android/expoview/src/main/java/host/exp/expoview/Exponent.java to use the new RN 0.61 API when appropriate (and the old API when appropriate).

This is the commented-out code in Exponent.java:

-        Field debugServerHostPortField = fieldObject.rnClass().getDeclaredField("DEBUG_SERVER_HOST_PORT");
-        debugServerHostPortField.setAccessible(true);
-        debugServerHostPortField.set(null, debuggerHostPort);
+        // Field debugServerHostPortField = fieldObject.rnClass().getDeclaredField("DEBUG_SERVER_HOST_PORT");
+        // debugServerHostPortField.setAccessible(true);
+        // debugServerHostPortField.set(null, debuggerHostPort);

One possible fix is to add a setter method to the RN class that we call, instead of trying to override the port with reflection. Not sure what is most robust here.

[brentvatne]

related PR upstream facebook/react-native#23616