Add version 1.8 of kotlinc to third-party dependencneis

Contents of README.google:
Name: Kotlin
URL: https://github.com/JetBrains/kotlin/
Version: 1.8.0
Revision: NA
License: Apache License Version 2.0

Bug: b/266177488
Change-Id: I7cd353b1cd254530a2b4eb563f818c9886760486
diff --git a/build.gradle b/build.gradle
index f5838d6..6429c57 100644
--- a/build.gradle
+++ b/build.gradle
@@ -388,6 +388,7 @@
                 "kotlin/kotlin-compiler-1.5.0",
                 "kotlin/kotlin-compiler-1.6.0",
                 "kotlin/kotlin-compiler-1.7.0",
+                "kotlin/kotlin-compiler-1.8.0",
                 "kotlinx-coroutines-1.3.6",
                 "multidex",
                 "openjdk/openjdk-rt-1.8",