Call VMRuntime.clampGrowthLimit for small heap apps

If the manifest doesn't specify large heaps, we now call
VMRuntime.clampGrowthLimit to release heap virtual address space
which won't ever get used.

Bug: 18387825
Bug: 17131630
Change-Id: I61fdcd70c70234256637eeebefe3abb22b91095d
1 file changed