RadioV1_1 VTS Tests: startKeepalive, stopKeepalive

VTS tests for the initial implementaion of NATT
Keepalive support in the V1_1 HAL.

Bug:63530561
Test: this
Change-Id: Iafabd4b0f8a8f4da78f65bf4061d47f4bfd69a7a
3 files changed