Revert "Update kotlinx-coroutines to v1.7.0 (#1025)"

This reverts commit c1b5ce0.

Blocked by Kotlin/kotlinx.coroutines#3673

Author: squarejesse

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 kotlin = "1.8.20"
-kotlinx-coroutines = "1.7.0"
+kotlinx-coroutines = "1.6.4"
 kotlinx-serialization = "1.5.0"
 androidxComposeCompiler = "1.4.5"
 androidx-activity = "1.7.1"