CQ: Add ARM64 trybots and rename the 32-bit one.
CQ: Add ARM64 trybots and rename the 32-bit one.

BUG=webrtc:7024
NOTRY=True
R=ehmaldonado@webrtc.org

Review-Url: https://codereview.webrtc.org/2781453005 .
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#17444}

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