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
Change-Id: I188cb530a44dd109e066a22091f12f8d2d4350c3
3 files changed