Replace .toList() with .collect()

.toList() was only introduced to android in api level 34, which is newer than
this module's min_sdk_version. Replace it with .collect().

This was found while updating android lint.

Flag: EXEMPT refactor
Bug: 394096385
Test: Presubmits
Change-Id: Ia1cc4a7c2aac3a391b847723e4ef5aa44d8f1c8c