Disabling signed integer overflow protection.

Likely benign integer overflows in the AMR-NB encoder are
causing SIGABRTs under normal speech processing. Disabling
this protection until bug 25597150  is resolved and further
testing can be performed.

Bug: 25409744
Change-Id: Ib40d2e03b84c73c573eca637253ed68977986b11
2 files changed