Replace DCHECK with ASSERT_TRUE in vie_encoder_unittest.cc
Replace DCHECK with ASSERT_TRUE in vie_encoder_unittest.cc

BUG=none
TBR=sprang@webrtc.org

Review-Url: https://codereview.webrtc.org/2699593007
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#16656}

TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc