NO NOT MERGE ANYWHERE. Remove all the extra accessor methods added by javac in support-recyclerview.

Change private methods to be package protected to avoid extra methods
that get added to be able to access them from inner classes.

This CL saves 119 methods in our jar.

Bug: 31075707
Change-Id: I1c3147a196ae70ef14080a955d4399e01a997b1a
11 files changed