Update kotlinc to 1.7.20

Fixes: 216136346
Test: m checkbuild
Change-Id: I75f24ad1e39eeb4ae63695371a25e4f55edf14d0
Merged-In: I75f24ad1e39eeb4ae63695371a25e4f55edf14d0
(cherry picked from commit 4e3c9ce7ac69b2d33edcd6e3302c9fddd66e3f38)
56 files changed