Reduce IndirectReferenceTable memory usage

Changed the slot side table and the main table to be a single
table, reduced number of slots per reference from 4 to 3 to make
the IrtEntry a power of 2 size.

20848 kB: Dalvik Other

16760 kB: Dalvik Other

Bug: 17643507

Change-Id: I4820ca381e906c2e396208df67f2f53816047bf5
3 files changed