Filter not needed classes

Certain classes can be loaded directly from the system class loader so
there is no need for them to be in the layoutlib jar. Filter them out to
avoid importing them accidentally.

Bug: N/A
Test: N/A
Change-Id: I65eb70b9f72303d0c1cad158024912230ab5186c
(cherry picked from commit 479c624eea7d9d9df9ac6009ffbd474a843fe31f)