Android R Beta 2
Keep libcore.io classes for MemoryMappedFile_Delegate in layoutlib

libcore.io.MemoryMappedFile is now not referenced explicitly, but still
used by MemoryMappedFile_Delegate. Explicitly keep libcore.io classes,
but the caller MemoryMappedFile_Delegate may also be possible able to be
deleted.

Bug: 141747409
Test: m layoutlib
Merged-In: I5c50003da2c80bd71b0a5f63ed6223be8b4f8b31
Change-Id: I5c50003da2c80bd71b0a5f63ed6223be8b4f8b31
1 file changed