Adding a getter to the loadedLibraries collection size
Adding a getter to the loadedLibraries collection size

Summary: Adding a getter to the loadedLibraries collection size. Since .size() just accesses an int property without modifying any internal state, synchronization doesn't seem required. The consequence of that is the number is not necessarily accurate but it is acceptable.

Reviewed By: dezfx

Differential Revision: D36957428

fbshipit-source-id: 0f38a921f329d0b8d15d3ed700cec3fc476727ac

facebook/SoLoader,facebook/SoLoader,facebook/SoLoader