Speed up 080-oom-throw

Change the heap filling algorithm to use fewer size classes.
Allocating more objects is much cheaper than running out of memory
more often.

time art/test/run-test --host 080-oom-throw
Speeds up from about 16 seconds to 12 seconds elapsed time,
including any script overhead.

Bug: 262517556
Test: Time test on host, Treehugger
Change-Id: Ifcdb90cbf493f5fded0e5a573268edb7b01a1b01
1 file changed