Use fb_android_library instead of android_library.

Summary: https://our.intern.facebook.com/intern/dex/buck/python-to-skylark/

Reviewed By: adamjernst

Differential Revision: D7082249

fbshipit-source-id: 5a79363651b14d3086759057fb812c9747ee46f9

LITHO_DEFS

@@ -165,3 +165,7 @@ def fb_android_resource(**kwargs):
 def fb_java_library(**kwargs):
     """Delegates to native java_library rule."""
     java_library(**kwargs)
+
+def fb_android_library(**kwargs):
+    """Delegates to native android_library rule."""
+    android_library(**kwargs)