Remove all the extra accessor methods added by javac in support-cardview.

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 4 methods in our jar.

Bug: 31075707
Change-Id: I0ce25d52e17c89dbaef5b3e8a88d959eb5e390cb
1 file changed