Set UIManagerType as required for source_only_abi

Summary: This allows using this annotation when Buck has `java.abi_generation_mode = source_only` set.

Differential Revision: D14119311

fbshipit-source-id: 020e709924e70adb8a160069a1da9b209b99befa

ReactAndroid/src/main/java/com/facebook/react/uimanager/common/BUCK

@@ -6,6 +6,7 @@ rn_android_library(
     provided_deps = [
         react_native_dep("third-party/android/support/v4:lib-support-v4"),
     ],
+    required_for_source_only_abi = True,
     visibility = [
         "PUBLIC",
     ],