Move default native bridge value to build.prop

Before this change it was part of default.prop, which is applied
before init.rc is executed, so that scripts cannot override the property.

In contrast, build.prop is applied at "init-late" stage,
so that one has a chance to override the property in scripts using
"init" or "init-early" triggers.

(cherry-picked from 74b2da9db67f5da2195c9b07dab22c868934e396)

Test: fugu still works
Bug: 63133475
Merged-In: I0842abaaec1d353ebe4debda6dfe3e2c42146786
Change-Id: I0842abaaec1d353ebe4debda6dfe3e2c42146786