Fix native allocation watermark clamping.

The main issue causing the test to fail is that
native_footprint_gc_watermark_ becoming > growth_limit_ due to no
clamping.

Temporary runFinalization fix is calling runFinalization 2x.

Bug: 17371542

(cherry picked from commit 4c7fc5950853b0c368e2148db77ced7c4d3c303c)

Change-Id: I05b85e95560c32c33d53bc96abf87d5262007395
3 files changed