Revert "Upgrade to kotlinc v1.5.0"

This reverts commit 74359acd4d05aaf956d92677d2c9725e2a4d59a9.

Reason for revert: b/187908823

Change-Id: Ic858ac6b4ad4f47565ca0b59fe6a49b8fc2e8b3d
(cherry picked from commit 4d583b8478d648f929ca4b7483e3c099534c8117)
58 files changed