Objecthelper

Summary:
Split off objecthelper into a (future) public and an fb-only version. This also open-sources the very first bit which is pretty useless on its own, but will already compile as its neatly stand-alone.

Note that this blocks releases until we have a stable version of Fresco to depend on.

Reviewed By: oprisnik

Differential Revision: D14149645

fbshipit-source-id: 0020d7ceccf89999695414ce389106ca6325ab7e

android/build.gradle

@@ -53,6 +53,10 @@ android {
         implementation deps.lithoSectionsDebug
         implementation deps.lithoWidget
         implementation deps.rhino
+        // TODO(T40752310): Should be depending on a stable version.
+        compileOnly('com.github.facebook:fresco:0ff379c262') {
+            exclude group: 'com.squareup.okhttp3'
+        }
         compileOnly deps.leakcanary
 
         testImplementation deps.mockito